Home / 31,146.40-42,981.42-16,999.35

Finding the Fourth Proportional to 31,146.40, 42,981.42 and 16,999.35

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Solution

The fourth proportional to 31,146.40, 42,981.42 and 16,999.35 is: 23,458.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,146.40 : 42,981.42 = 16,999.35 : x
  2. Step 2: Convert to fraction form
    31,146.40/42,981.42 = 16,999.35/x
  3. Step 3: Cross multiply
    31,146.40x = 42,981.42 × 16,999.35
  4. Step 4: Simplify right side
    31,146.40x = 730,656,104.64
  5. Step 5: Solve for x
    x = 730,656,104.64/31,146.40
  6. Step 6: Final answer
    x = 23,458.76

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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.