Home / 20,031.20-29,989.20-19,455.20

Finding the Fourth Proportional to 20,031.20, 29,989.20 and 19,455.20

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Solution

The fourth proportional to 20,031.20, 29,989.20 and 19,455.20 is: 29,126.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,031.20 : 29,989.20 = 19,455.20 : x
  2. Step 2: Convert to fraction form
    20,031.20/29,989.20 = 19,455.20/x
  3. Step 3: Cross multiply
    20,031.20x = 29,989.20 × 19,455.20
  4. Step 4: Simplify right side
    20,031.20x = 583,445,883.84
  5. Step 5: Solve for x
    x = 583,445,883.84/20,031.20
  6. Step 6: Final answer
    x = 29,126.86

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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.