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Finding the Fourth Proportional to 28,385.60, 42,597.60 and 15,905.60

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Solution

The fourth proportional to 28,385.60, 42,597.60 and 15,905.60 is: 23,869.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.60 : 42,597.60 = 15,905.60 : x
  2. Step 2: Convert to fraction form
    28,385.60/42,597.60 = 15,905.60/x
  3. Step 3: Cross multiply
    28,385.60x = 42,597.60 × 15,905.60
  4. Step 4: Simplify right side
    28,385.60x = 677,540,386.56
  5. Step 5: Solve for x
    x = 677,540,386.56/28,385.60
  6. Step 6: Final answer
    x = 23,869.16

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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.