Home / 15,471.86-21,343.64-9,179.78

Finding the Fourth Proportional to 15,471.86, 21,343.64 and 9,179.78

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Solution

The fourth proportional to 15,471.86, 21,343.64 and 9,179.78 is: 12,663.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.86 : 21,343.64 = 9,179.78 : x
  2. Step 2: Convert to fraction form
    15,471.86/21,343.64 = 9,179.78/x
  3. Step 3: Cross multiply
    15,471.86x = 21,343.64 × 9,179.78
  4. Step 4: Simplify right side
    15,471.86x = 195,929,919.60
  5. Step 5: Solve for x
    x = 195,929,919.60/15,471.86
  6. Step 6: Final answer
    x = 12,663.63

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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.