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Finding the Fourth Proportional to 15,673.71, 21,630.20 and 8,600.61

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Solution

The fourth proportional to 15,673.71, 21,630.20 and 8,600.61 is: 11,869.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,673.71 : 21,630.20 = 8,600.61 : x
  2. Step 2: Convert to fraction form
    15,673.71/21,630.20 = 8,600.61/x
  3. Step 3: Cross multiply
    15,673.71x = 21,630.20 × 8,600.61
  4. Step 4: Simplify right side
    15,673.71x = 186,032,871.42
  5. Step 5: Solve for x
    x = 186,032,871.42/15,673.71
  6. Step 6: Final answer
    x = 11,869.10

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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.