Home / 31,385.52-43,314.36-20,637.36

Finding the Fourth Proportional to 31,385.52, 43,314.36 and 20,637.36

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Solution

The fourth proportional to 31,385.52, 43,314.36 and 20,637.36 is: 28,481.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,385.52 : 43,314.36 = 20,637.36 : x
  2. Step 2: Convert to fraction form
    31,385.52/43,314.36 = 20,637.36/x
  3. Step 3: Cross multiply
    31,385.52x = 43,314.36 × 20,637.36
  4. Step 4: Simplify right side
    31,385.52x = 893,894,040.49
  5. Step 5: Solve for x
    x = 893,894,040.49/31,385.52
  6. Step 6: Final answer
    x = 28,481.10

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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.