Home / 28,178.11-42,267.57-13,388.55

Finding the Fourth Proportional to 28,178.11, 42,267.57 and 13,388.55

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Solution

The fourth proportional to 28,178.11, 42,267.57 and 13,388.55 is: 20,083.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.11 : 42,267.57 = 13,388.55 : x
  2. Step 2: Convert to fraction form
    28,178.11/42,267.57 = 13,388.55/x
  3. Step 3: Cross multiply
    28,178.11x = 42,267.57 × 13,388.55
  4. Step 4: Simplify right side
    28,178.11x = 565,901,474.32
  5. Step 5: Solve for x
    x = 565,901,474.32/28,178.11
  6. Step 6: Final answer
    x = 20,083.02

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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.