Home / 28,001.60-42,002.40-18,087.20

Finding the Fourth Proportional to 28,001.60, 42,002.40 and 18,087.20

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Solution

The fourth proportional to 28,001.60, 42,002.40 and 18,087.20 is: 27,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,001.60 : 42,002.40 = 18,087.20 : x
  2. Step 2: Convert to fraction form
    28,001.60/42,002.40 = 18,087.20/x
  3. Step 3: Cross multiply
    28,001.60x = 42,002.40 × 18,087.20
  4. Step 4: Simplify right side
    28,001.60x = 759,705,809.28
  5. Step 5: Solve for x
    x = 759,705,809.28/28,001.60
  6. Step 6: Final answer
    x = 27,130.80

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Similar ratio
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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.