Home / 15,458.62-21,332.78-8,385.05

Finding the Fourth Proportional to 15,458.62, 21,332.78 and 8,385.05

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Solution

The fourth proportional to 15,458.62, 21,332.78 and 8,385.05 is: 11,571.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,458.62 : 21,332.78 = 8,385.05 : x
  2. Step 2: Convert to fraction form
    15,458.62/21,332.78 = 8,385.05/x
  3. Step 3: Cross multiply
    15,458.62x = 21,332.78 × 8,385.05
  4. Step 4: Simplify right side
    15,458.62x = 178,876,320.28
  5. Step 5: Solve for x
    x = 178,876,320.28/15,458.62
  6. Step 6: Final answer
    x = 11,571.30

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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.