Home / 31,079.12-42,874.88-18,323.60

Finding the Fourth Proportional to 31,079.12, 42,874.88 and 18,323.60

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Solution

The fourth proportional to 31,079.12, 42,874.88 and 18,323.60 is: 25,278.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,079.12 : 42,874.88 = 18,323.60 : x
  2. Step 2: Convert to fraction form
    31,079.12/42,874.88 = 18,323.60/x
  3. Step 3: Cross multiply
    31,079.12x = 42,874.88 × 18,323.60
  4. Step 4: Simplify right side
    31,079.12x = 785,621,845.18
  5. Step 5: Solve for x
    x = 785,621,845.18/31,079.12
  6. Step 6: Final answer
    x = 25,278.13

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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.