Home / 28,188.20-42,254.49-12,401.75

Finding the Fourth Proportional to 28,188.20, 42,254.49 and 12,401.75

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Solution

The fourth proportional to 28,188.20, 42,254.49 and 12,401.75 is: 18,590.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188.20 : 42,254.49 = 12,401.75 : x
  2. Step 2: Convert to fraction form
    28,188.20/42,254.49 = 12,401.75/x
  3. Step 3: Cross multiply
    28,188.20x = 42,254.49 × 12,401.75
  4. Step 4: Simplify right side
    28,188.20x = 524,029,621.36
  5. Step 5: Solve for x
    x = 524,029,621.36/28,188.20
  6. Step 6: Final answer
    x = 18,590.39

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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.