Home / 28,139.40-42,209.10-7,362.90

Finding the Fourth Proportional to 28,139.40, 42,209.10 and 7,362.90

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Solution

The fourth proportional to 28,139.40, 42,209.10 and 7,362.90 is: 11,044.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.40 : 42,209.10 = 7,362.90 : x
  2. Step 2: Convert to fraction form
    28,139.40/42,209.10 = 7,362.90/x
  3. Step 3: Cross multiply
    28,139.40x = 42,209.10 × 7,362.90
  4. Step 4: Simplify right side
    28,139.40x = 310,781,382.39
  5. Step 5: Solve for x
    x = 310,781,382.39/28,139.40
  6. Step 6: Final answer
    x = 11,044.35

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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.