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Finding the Fourth Proportional to 29,111.60, 43,710.60 and 20,385.20

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Solution

The fourth proportional to 29,111.60, 43,710.60 and 20,385.20 is: 30,608.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,111.60 : 43,710.60 = 20,385.20 : x
  2. Step 2: Convert to fraction form
    29,111.60/43,710.60 = 20,385.20/x
  3. Step 3: Cross multiply
    29,111.60x = 43,710.60 × 20,385.20
  4. Step 4: Simplify right side
    29,111.60x = 891,049,323.12
  5. Step 5: Solve for x
    x = 891,049,323.12/29,111.60
  6. Step 6: Final answer
    x = 30,608.05

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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.