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Finding the Fourth Proportional to 7,681.25, 10,619.16 and 7,611.19

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Solution

The fourth proportional to 7,681.25, 10,619.16 and 7,611.19 is: 10,522.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,681.25 : 10,619.16 = 7,611.19 : x
  2. Step 2: Convert to fraction form
    7,681.25/10,619.16 = 7,611.19/x
  3. Step 3: Cross multiply
    7,681.25x = 10,619.16 × 7,611.19
  4. Step 4: Simplify right side
    7,681.25x = 80,824,417.85
  5. Step 5: Solve for x
    x = 80,824,417.85/7,681.25
  6. Step 6: Final answer
    x = 10,522.30

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.