Home / 28,129.42-42,117.28-20,239.82

Finding the Fourth Proportional to 28,129.42, 42,117.28 and 20,239.82

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Solution

The fourth proportional to 28,129.42, 42,117.28 and 20,239.82 is: 30,304.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.42 : 42,117.28 = 20,239.82 : x
  2. Step 2: Convert to fraction form
    28,129.42/42,117.28 = 20,239.82/x
  3. Step 3: Cross multiply
    28,129.42x = 42,117.28 × 20,239.82
  4. Step 4: Simplify right side
    28,129.42x = 852,446,166.09
  5. Step 5: Solve for x
    x = 852,446,166.09/28,129.42
  6. Step 6: Final answer
    x = 30,304.43

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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.