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Finding the Fourth Proportional to 28,248.59, 38,978.97 and 18,190.67

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Solution

The fourth proportional to 28,248.59, 38,978.97 and 18,190.67 is: 25,100.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,248.59 : 38,978.97 = 18,190.67 : x
  2. Step 2: Convert to fraction form
    28,248.59/38,978.97 = 18,190.67/x
  3. Step 3: Cross multiply
    28,248.59x = 38,978.97 × 18,190.67
  4. Step 4: Simplify right side
    28,248.59x = 709,053,385.32
  5. Step 5: Solve for x
    x = 709,053,385.32/28,248.59
  6. Step 6: Final answer
    x = 25,100.49

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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.