Home / 28,125.43-42,111.29-20,235.83

Finding the Fourth Proportional to 28,125.43, 42,111.29 and 20,235.83

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Solution

The fourth proportional to 28,125.43, 42,111.29 and 20,235.83 is: 30,298.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,125.43 : 42,111.29 = 20,235.83 : x
  2. Step 2: Convert to fraction form
    28,125.43/42,111.29 = 20,235.83/x
  3. Step 3: Cross multiply
    28,125.43x = 42,111.29 × 20,235.83
  4. Step 4: Simplify right side
    28,125.43x = 852,156,745.55
  5. Step 5: Solve for x
    x = 852,156,745.55/28,125.43
  6. Step 6: Final answer
    x = 30,298.45

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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.