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Finding the Fourth Proportional to 28,151.48, 38,839.02 and 18,090.20

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Solution

The fourth proportional to 28,151.48, 38,839.02 and 18,090.20 is: 24,958.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,151.48 : 38,839.02 = 18,090.20 : x
  2. Step 2: Convert to fraction form
    28,151.48/38,839.02 = 18,090.20/x
  3. Step 3: Cross multiply
    28,151.48x = 38,839.02 × 18,090.20
  4. Step 4: Simplify right side
    28,151.48x = 702,605,639.60
  5. Step 5: Solve for x
    x = 702,605,639.60/28,151.48
  6. Step 6: Final answer
    x = 24,958.04

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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.