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Finding the Fourth Proportional to 16,390.68, 22,618.80 and 8,938.68

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Solution

The fourth proportional to 16,390.68, 22,618.80 and 8,938.68 is: 12,335.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,390.68 : 22,618.80 = 8,938.68 : x
  2. Step 2: Convert to fraction form
    16,390.68/22,618.80 = 8,938.68/x
  3. Step 3: Cross multiply
    16,390.68x = 22,618.80 × 8,938.68
  4. Step 4: Simplify right side
    16,390.68x = 202,182,215.18
  5. Step 5: Solve for x
    x = 202,182,215.18/16,390.68
  6. Step 6: Final answer
    x = 12,335.19

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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.