Home / 15,711.19-21,681.30-8,637.58

Finding the Fourth Proportional to 15,711.19, 21,681.30 and 8,637.58

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Solution

The fourth proportional to 15,711.19, 21,681.30 and 8,637.58 is: 11,919.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.19 : 21,681.30 = 8,637.58 : x
  2. Step 2: Convert to fraction form
    15,711.19/21,681.30 = 8,637.58/x
  3. Step 3: Cross multiply
    15,711.19x = 21,681.30 × 8,637.58
  4. Step 4: Simplify right side
    15,711.19x = 187,273,963.25
  5. Step 5: Solve for x
    x = 187,273,963.25/15,711.19
  6. Step 6: Final answer
    x = 11,919.78

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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.