Home / 31,719.52-43,752.64-20,385.16

Finding the Fourth Proportional to 31,719.52, 43,752.64 and 20,385.16

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Solution

The fourth proportional to 31,719.52, 43,752.64 and 20,385.16 is: 28,118.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,719.52 : 43,752.64 = 20,385.16 : x
  2. Step 2: Convert to fraction form
    31,719.52/43,752.64 = 20,385.16/x
  3. Step 3: Cross multiply
    31,719.52x = 43,752.64 × 20,385.16
  4. Step 4: Simplify right side
    31,719.52x = 891,904,566.82
  5. Step 5: Solve for x
    x = 891,904,566.82/31,719.52
  6. Step 6: Final answer
    x = 28,118.48

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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.