Home / 28,278.42-42,433.95-15,138.12

Finding the Fourth Proportional to 28,278.42, 42,433.95 and 15,138.12

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Solution

The fourth proportional to 28,278.42, 42,433.95 and 15,138.12 is: 22,715.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,278.42 : 42,433.95 = 15,138.12 : x
  2. Step 2: Convert to fraction form
    28,278.42/42,433.95 = 15,138.12/x
  3. Step 3: Cross multiply
    28,278.42x = 42,433.95 × 15,138.12
  4. Step 4: Simplify right side
    28,278.42x = 642,370,227.17
  5. Step 5: Solve for x
    x = 642,370,227.17/28,278.42
  6. Step 6: Final answer
    x = 22,715.92

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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.