Home / 15,711.22-21,681.90-8,541.62

Finding the Fourth Proportional to 15,711.22, 21,681.90 and 8,541.62

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Solution

The fourth proportional to 15,711.22, 21,681.90 and 8,541.62 is: 11,787.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.22 : 21,681.90 = 8,541.62 : x
  2. Step 2: Convert to fraction form
    15,711.22/21,681.90 = 8,541.62/x
  3. Step 3: Cross multiply
    15,711.22x = 21,681.90 × 8,541.62
  4. Step 4: Simplify right side
    15,711.22x = 185,198,550.68
  5. Step 5: Solve for x
    x = 185,198,550.68/15,711.22
  6. Step 6: Final answer
    x = 11,787.66

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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.