Home / 31,561.28-43,550.88-18,987.20

Finding the Fourth Proportional to 31,561.28, 43,550.88 and 18,987.20

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Solution

The fourth proportional to 31,561.28, 43,550.88 and 18,987.20 is: 26,200.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,561.28 : 43,550.88 = 18,987.20 : x
  2. Step 2: Convert to fraction form
    31,561.28/43,550.88 = 18,987.20/x
  3. Step 3: Cross multiply
    31,561.28x = 43,550.88 × 18,987.20
  4. Step 4: Simplify right side
    31,561.28x = 826,909,268.74
  5. Step 5: Solve for x
    x = 826,909,268.74/31,561.28
  6. Step 6: Final answer
    x = 26,200.12

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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.