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Finding the Fourth Proportional to 15,658.71, 21,609.01 and 8,585.11

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Solution

The fourth proportional to 15,658.71, 21,609.01 and 8,585.11 is: 11,847.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,658.71 : 21,609.01 = 8,585.11 : x
  2. Step 2: Convert to fraction form
    15,658.71/21,609.01 = 8,585.11/x
  3. Step 3: Cross multiply
    15,658.71x = 21,609.01 × 8,585.11
  4. Step 4: Simplify right side
    15,658.71x = 185,515,727.84
  5. Step 5: Solve for x
    x = 185,515,727.84/15,658.71
  6. Step 6: Final answer
    x = 11,847.45

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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.