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Finding the Fourth Proportional to 15,635.81, 21,572.02 and 8,916.59

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Solution

The fourth proportional to 15,635.81, 21,572.02 and 8,916.59 is: 12,301.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,635.81 : 21,572.02 = 8,916.59 : x
  2. Step 2: Convert to fraction form
    15,635.81/21,572.02 = 8,916.59/x
  3. Step 3: Cross multiply
    15,635.81x = 21,572.02 × 8,916.59
  4. Step 4: Simplify right side
    15,635.81x = 192,348,857.81
  5. Step 5: Solve for x
    x = 192,348,857.81/15,635.81
  6. Step 6: Final answer
    x = 12,301.82

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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.