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Finding the Fourth Proportional to 10,609.60, 15,917.60 and 5,681.60

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Solution

The fourth proportional to 10,609.60, 15,917.60 and 5,681.60 is: 8,524.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,609.60 : 15,917.60 = 5,681.60 : x
  2. Step 2: Convert to fraction form
    10,609.60/15,917.60 = 5,681.60/x
  3. Step 3: Cross multiply
    10,609.60x = 15,917.60 × 5,681.60
  4. Step 4: Simplify right side
    10,609.60x = 90,437,436.16
  5. Step 5: Solve for x
    x = 90,437,436.16/10,609.60
  6. Step 6: Final answer
    x = 8,524.11

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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.