Home / 31,001.28-42,780.84-16,853.76

Finding the Fourth Proportional to 31,001.28, 42,780.84 and 16,853.76

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Solution

The fourth proportional to 31,001.28, 42,780.84 and 16,853.76 is: 23,257.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,001.28 : 42,780.84 = 16,853.76 : x
  2. Step 2: Convert to fraction form
    31,001.28/42,780.84 = 16,853.76/x
  3. Step 3: Cross multiply
    31,001.28x = 42,780.84 × 16,853.76
  4. Step 4: Simplify right side
    31,001.28x = 721,018,009.96
  5. Step 5: Solve for x
    x = 721,018,009.96/31,001.28
  6. Step 6: Final answer
    x = 23,257.69

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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.