Home / 19,405.20-29,129.40-10,657.20

Finding the Fourth Proportional to 19,405.20, 29,129.40 and 10,657.20

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Solution

The fourth proportional to 19,405.20, 29,129.40 and 10,657.20 is: 15,997.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,405.20 : 29,129.40 = 10,657.20 : x
  2. Step 2: Convert to fraction form
    19,405.20/29,129.40 = 10,657.20/x
  3. Step 3: Cross multiply
    19,405.20x = 29,129.40 × 10,657.20
  4. Step 4: Simplify right side
    19,405.20x = 310,437,841.68
  5. Step 5: Solve for x
    x = 310,437,841.68/19,405.20
  6. Step 6: Final answer
    x = 15,997.66

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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.