Home / 57,478.05-86,211.95-20,031.75

Finding the Fourth Proportional to 57,478.05, 86,211.95 and 20,031.75

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Solution

The fourth proportional to 57,478.05, 86,211.95 and 20,031.75 is: 30,045.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,478.05 : 86,211.95 = 20,031.75 : x
  2. Step 2: Convert to fraction form
    57,478.05/86,211.95 = 20,031.75/x
  3. Step 3: Cross multiply
    57,478.05x = 86,211.95 × 20,031.75
  4. Step 4: Simplify right side
    57,478.05x = 1,726,976,129.25
  5. Step 5: Solve for x
    x = 1,726,976,129.25/57,478.05
  6. Step 6: Final answer
    x = 30,045.84

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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.