Home / 31,140.95-42,974.49-18,565.70

Finding the Fourth Proportional to 31,140.95, 42,974.49 and 18,565.70

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Solution

The fourth proportional to 31,140.95, 42,974.49 and 18,565.70 is: 25,620.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,140.95 : 42,974.49 = 18,565.70 : x
  2. Step 2: Convert to fraction form
    31,140.95/42,974.49 = 18,565.70/x
  3. Step 3: Cross multiply
    31,140.95x = 42,974.49 × 18,565.70
  4. Step 4: Simplify right side
    31,140.95x = 797,851,274.12
  5. Step 5: Solve for x
    x = 797,851,274.12/31,140.95
  6. Step 6: Final answer
    x = 25,620.65

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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.