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Finding the Fourth Proportional to 29,008.40, 43,512.60 and 7,120.40

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Solution

The fourth proportional to 29,008.40, 43,512.60 and 7,120.40 is: 10,680.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,008.40 : 43,512.60 = 7,120.40 : x
  2. Step 2: Convert to fraction form
    29,008.40/43,512.60 = 7,120.40/x
  3. Step 3: Cross multiply
    29,008.40x = 43,512.60 × 7,120.40
  4. Step 4: Simplify right side
    29,008.40x = 309,827,117.04
  5. Step 5: Solve for x
    x = 309,827,117.04/29,008.40
  6. Step 6: Final answer
    x = 10,680.60

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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.