Home / 15,591.73-21,516.59-8,421.65

Finding the Fourth Proportional to 15,591.73, 21,516.59 and 8,421.65

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Solution

The fourth proportional to 15,591.73, 21,516.59 and 8,421.65 is: 11,621.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591.73 : 21,516.59 = 8,421.65 : x
  2. Step 2: Convert to fraction form
    15,591.73/21,516.59 = 8,421.65/x
  3. Step 3: Cross multiply
    15,591.73x = 21,516.59 × 8,421.65
  4. Step 4: Simplify right side
    15,591.73x = 181,205,201.86
  5. Step 5: Solve for x
    x = 181,205,201.86/15,591.73
  6. Step 6: Final answer
    x = 11,621.88

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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.