Home / 21,006.38-28,988.90-11,574.74

Finding the Fourth Proportional to 21,006.38, 28,988.90 and 11,574.74

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Solution

The fourth proportional to 21,006.38, 28,988.90 and 11,574.74 is: 15,973.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.38 : 28,988.90 = 11,574.74 : x
  2. Step 2: Convert to fraction form
    21,006.38/28,988.90 = 11,574.74/x
  3. Step 3: Cross multiply
    21,006.38x = 28,988.90 × 11,574.74
  4. Step 4: Simplify right side
    21,006.38x = 335,538,777.57
  5. Step 5: Solve for x
    x = 335,538,777.57/21,006.38
  6. Step 6: Final answer
    x = 15,973.19

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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.