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Finding the Fourth Proportional to 7,667.80, 11,501.70 and 6,501.40

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Solution

The fourth proportional to 7,667.80, 11,501.70 and 6,501.40 is: 9,752.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,667.80 : 11,501.70 = 6,501.40 : x
  2. Step 2: Convert to fraction form
    7,667.80/11,501.70 = 6,501.40/x
  3. Step 3: Cross multiply
    7,667.80x = 11,501.70 × 6,501.40
  4. Step 4: Simplify right side
    7,667.80x = 74,777,152.38
  5. Step 5: Solve for x
    x = 74,777,152.38/7,667.80
  6. Step 6: Final answer
    x = 9,752.10

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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.