Home / 15,711.59-21,678.72-9,340.43

Finding the Fourth Proportional to 15,711.59, 21,678.72 and 9,340.43

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Solution

The fourth proportional to 15,711.59, 21,678.72 and 9,340.43 is: 12,887.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.59 : 21,678.72 = 9,340.43 : x
  2. Step 2: Convert to fraction form
    15,711.59/21,678.72 = 9,340.43/x
  3. Step 3: Cross multiply
    15,711.59x = 21,678.72 × 9,340.43
  4. Step 4: Simplify right side
    15,711.59x = 202,488,566.65
  5. Step 5: Solve for x
    x = 202,488,566.65/15,711.59
  6. Step 6: Final answer
    x = 12,887.85

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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.