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Finding the Fourth Proportional to 38,157, 52,652.36 and 21,389.64

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Solution

The fourth proportional to 38,157, 52,652.36 and 21,389.64 is: 29,515.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,157 : 52,652.36 = 21,389.64 : x
  2. Step 2: Convert to fraction form
    38,157/52,652.36 = 21,389.64/x
  3. Step 3: Cross multiply
    38,157x = 52,652.36 × 21,389.64
  4. Step 4: Simplify right side
    38,157x = 1,126,215,025.55
  5. Step 5: Solve for x
    x = 1,126,215,025.55/38,157
  6. Step 6: Final answer
    x = 29,515.29

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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.