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Finding the Fourth Proportional to 21,675.71, 32,513.11 and 9,988.93

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Solution

The fourth proportional to 21,675.71, 32,513.11 and 9,988.93 is: 14,983.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,675.71 : 32,513.11 = 9,988.93 : x
  2. Step 2: Convert to fraction form
    21,675.71/32,513.11 = 9,988.93/x
  3. Step 3: Cross multiply
    21,675.71x = 32,513.11 × 9,988.93
  4. Step 4: Simplify right side
    21,675.71x = 324,771,195.54
  5. Step 5: Solve for x
    x = 324,771,195.54/21,675.71
  6. Step 6: Final answer
    x = 14,983.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.