Home / 28,113.67-42,169.83-9,138.28

Finding the Fourth Proportional to 28,113.67, 42,169.83 and 9,138.28

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Solution

The fourth proportional to 28,113.67, 42,169.83 and 9,138.28 is: 13,707.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,113.67 : 42,169.83 = 9,138.28 : x
  2. Step 2: Convert to fraction form
    28,113.67/42,169.83 = 9,138.28/x
  3. Step 3: Cross multiply
    28,113.67x = 42,169.83 × 9,138.28
  4. Step 4: Simplify right side
    28,113.67x = 385,359,849.17
  5. Step 5: Solve for x
    x = 385,359,849.17/28,113.67
  6. Step 6: Final answer
    x = 13,707.20

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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.