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Finding the Fourth Proportional to 28,415.70, 42,623.55 and 25,305.30

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Solution

The fourth proportional to 28,415.70, 42,623.55 and 25,305.30 is: 37,957.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.70 : 42,623.55 = 25,305.30 : x
  2. Step 2: Convert to fraction form
    28,415.70/42,623.55 = 25,305.30/x
  3. Step 3: Cross multiply
    28,415.70x = 42,623.55 × 25,305.30
  4. Step 4: Simplify right side
    28,415.70x = 1,078,601,719.82
  5. Step 5: Solve for x
    x = 1,078,601,719.82/28,415.70
  6. Step 6: Final answer
    x = 37,957.95

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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.