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Finding the Fourth Proportional to 10,636.80, 15,955.20 and 9,715.20

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Solution

The fourth proportional to 10,636.80, 15,955.20 and 9,715.20 is: 14,572.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,636.80 : 15,955.20 = 9,715.20 : x
  2. Step 2: Convert to fraction form
    10,636.80/15,955.20 = 9,715.20/x
  3. Step 3: Cross multiply
    10,636.80x = 15,955.20 × 9,715.20
  4. Step 4: Simplify right side
    10,636.80x = 155,007,959.04
  5. Step 5: Solve for x
    x = 155,007,959.04/10,636.80
  6. Step 6: Final answer
    x = 14,572.80

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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.