Home / 20,780.73-31,108.05-13,390.47

Finding the Fourth Proportional to 20,780.73, 31,108.05 and 13,390.47

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Solution

The fourth proportional to 20,780.73, 31,108.05 and 13,390.47 is: 20,045.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.73 : 31,108.05 = 13,390.47 : x
  2. Step 2: Convert to fraction form
    20,780.73/31,108.05 = 13,390.47/x
  3. Step 3: Cross multiply
    20,780.73x = 31,108.05 × 13,390.47
  4. Step 4: Simplify right side
    20,780.73x = 416,551,410.28
  5. Step 5: Solve for x
    x = 416,551,410.28/20,780.73
  6. Step 6: Final answer
    x = 20,045.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.