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Finding the Fourth Proportional to 18,963.54, 28,448.28 and 15,445.08

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Solution

The fourth proportional to 18,963.54, 28,448.28 and 15,445.08 is: 23,170.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,963.54 : 28,448.28 = 15,445.08 : x
  2. Step 2: Convert to fraction form
    18,963.54/28,448.28 = 15,445.08/x
  3. Step 3: Cross multiply
    18,963.54x = 28,448.28 × 15,445.08
  4. Step 4: Simplify right side
    18,963.54x = 439,385,960.46
  5. Step 5: Solve for x
    x = 439,385,960.46/18,963.54
  6. Step 6: Final answer
    x = 23,170.04

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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.