Home / 28,203.72-42,319.53-13,408.80

Finding the Fourth Proportional to 28,203.72, 42,319.53 and 13,408.80

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Solution

The fourth proportional to 28,203.72, 42,319.53 and 13,408.80 is: 20,119.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.72 : 42,319.53 = 13,408.80 : x
  2. Step 2: Convert to fraction form
    28,203.72/42,319.53 = 13,408.80/x
  3. Step 3: Cross multiply
    28,203.72x = 42,319.53 × 13,408.80
  4. Step 4: Simplify right side
    28,203.72x = 567,454,113.86
  5. Step 5: Solve for x
    x = 567,454,113.86/28,203.72
  6. Step 6: Final answer
    x = 20,119.83

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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.