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Finding the Fourth Proportional to 7,681.10, 11,521.65 and 7,000.70

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Solution

The fourth proportional to 7,681.10, 11,521.65 and 7,000.70 is: 10,501.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,681.10 : 11,521.65 = 7,000.70 : x
  2. Step 2: Convert to fraction form
    7,681.10/11,521.65 = 7,000.70/x
  3. Step 3: Cross multiply
    7,681.10x = 11,521.65 × 7,000.70
  4. Step 4: Simplify right side
    7,681.10x = 80,659,615.16
  5. Step 5: Solve for x
    x = 80,659,615.16/7,681.10
  6. Step 6: Final answer
    x = 10,501.05

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.