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Finding the Fourth Proportional to 18,753.64, 28,130.49 and 5,615.26

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Solution

The fourth proportional to 18,753.64, 28,130.49 and 5,615.26 is: 8,422.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.64 : 28,130.49 = 5,615.26 : x
  2. Step 2: Convert to fraction form
    18,753.64/28,130.49 = 5,615.26/x
  3. Step 3: Cross multiply
    18,753.64x = 28,130.49 × 5,615.26
  4. Step 4: Simplify right side
    18,753.64x = 157,960,015.28
  5. Step 5: Solve for x
    x = 157,960,015.28/18,753.64
  6. Step 6: Final answer
    x = 8,422.90

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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.