Home / 28,454.20-42,681.30-18,111.80

Finding the Fourth Proportional to 28,454.20, 42,681.30 and 18,111.80

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Solution

The fourth proportional to 28,454.20, 42,681.30 and 18,111.80 is: 27,167.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,454.20 : 42,681.30 = 18,111.80 : x
  2. Step 2: Convert to fraction form
    28,454.20/42,681.30 = 18,111.80/x
  3. Step 3: Cross multiply
    28,454.20x = 42,681.30 × 18,111.80
  4. Step 4: Simplify right side
    28,454.20x = 773,035,169.34
  5. Step 5: Solve for x
    x = 773,035,169.34/28,454.20
  6. Step 6: Final answer
    x = 27,167.70

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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.