Home / 15,345.39-21,176.85-9,057.76

Finding the Fourth Proportional to 15,345.39, 21,176.85 and 9,057.76

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Solution

The fourth proportional to 15,345.39, 21,176.85 and 9,057.76 is: 12,499.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.39 : 21,176.85 = 9,057.76 : x
  2. Step 2: Convert to fraction form
    15,345.39/21,176.85 = 9,057.76/x
  3. Step 3: Cross multiply
    15,345.39x = 21,176.85 × 9,057.76
  4. Step 4: Simplify right side
    15,345.39x = 191,814,824.86
  5. Step 5: Solve for x
    x = 191,814,824.86/15,345.39
  6. Step 6: Final answer
    x = 12,499.83

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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.