Home / 31,102.18-42,920.79-16,955.12

Finding the Fourth Proportional to 31,102.18, 42,920.79 and 16,955.12

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Solution

The fourth proportional to 31,102.18, 42,920.79 and 16,955.12 is: 23,397.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,102.18 : 42,920.79 = 16,955.12 : x
  2. Step 2: Convert to fraction form
    31,102.18/42,920.79 = 16,955.12/x
  3. Step 3: Cross multiply
    31,102.18x = 42,920.79 × 16,955.12
  4. Step 4: Simplify right side
    31,102.18x = 727,727,188.67
  5. Step 5: Solve for x
    x = 727,727,188.67/31,102.18
  6. Step 6: Final answer
    x = 23,397.95

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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.