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Finding the Fourth Proportional to 29,139.80, 43,698.90 and 10,412.60

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Solution

The fourth proportional to 29,139.80, 43,698.90 and 10,412.60 is: 15,615.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,139.80 : 43,698.90 = 10,412.60 : x
  2. Step 2: Convert to fraction form
    29,139.80/43,698.90 = 10,412.60/x
  3. Step 3: Cross multiply
    29,139.80x = 43,698.90 × 10,412.60
  4. Step 4: Simplify right side
    29,139.80x = 455,019,166.14
  5. Step 5: Solve for x
    x = 455,019,166.14/29,139.80
  6. Step 6: Final answer
    x = 15,615.04

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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.