Home / 28,380.16-42,555.12-10,839.88

Finding the Fourth Proportional to 28,380.16, 42,555.12 and 10,839.88

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Solution

The fourth proportional to 28,380.16, 42,555.12 and 10,839.88 is: 16,254.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.16 : 42,555.12 = 10,839.88 : x
  2. Step 2: Convert to fraction form
    28,380.16/42,555.12 = 10,839.88/x
  3. Step 3: Cross multiply
    28,380.16x = 42,555.12 × 10,839.88
  4. Step 4: Simplify right side
    28,380.16x = 461,292,394.19
  5. Step 5: Solve for x
    x = 461,292,394.19/28,380.16
  6. Step 6: Final answer
    x = 16,254.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.