Home / 31,119.48-42,937.20-18,372.96

Finding the Fourth Proportional to 31,119.48, 42,937.20 and 18,372.96

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Solution

The fourth proportional to 31,119.48, 42,937.20 and 18,372.96 is: 25,350.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,119.48 : 42,937.20 = 18,372.96 : x
  2. Step 2: Convert to fraction form
    31,119.48/42,937.20 = 18,372.96/x
  3. Step 3: Cross multiply
    31,119.48x = 42,937.20 × 18,372.96
  4. Step 4: Simplify right side
    31,119.48x = 788,883,458.11
  5. Step 5: Solve for x
    x = 788,883,458.11/31,119.48
  6. Step 6: Final answer
    x = 25,350.15

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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.