Home / 28,127.20-42,190.80-9,406.48

Finding the Fourth Proportional to 28,127.20, 42,190.80 and 9,406.48

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Solution

The fourth proportional to 28,127.20, 42,190.80 and 9,406.48 is: 14,109.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,127.20 : 42,190.80 = 9,406.48 : x
  2. Step 2: Convert to fraction form
    28,127.20/42,190.80 = 9,406.48/x
  3. Step 3: Cross multiply
    28,127.20x = 42,190.80 × 9,406.48
  4. Step 4: Simplify right side
    28,127.20x = 396,866,916.38
  5. Step 5: Solve for x
    x = 396,866,916.38/28,127.20
  6. Step 6: Final answer
    x = 14,109.72

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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.