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Finding the Fourth Proportional to 28,699, 39,606.68 and 16,123.76

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Solution

The fourth proportional to 28,699, 39,606.68 and 16,123.76 is: 22,251.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,699 : 39,606.68 = 16,123.76 : x
  2. Step 2: Convert to fraction form
    28,699/39,606.68 = 16,123.76/x
  3. Step 3: Cross multiply
    28,699x = 39,606.68 × 16,123.76
  4. Step 4: Simplify right side
    28,699x = 638,608,602.72
  5. Step 5: Solve for x
    x = 638,608,602.72/28,699
  6. Step 6: Final answer
    x = 22,251.95

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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.