Home / 20,587.80-28,408.86-15,000.60

Finding the Fourth Proportional to 20,587.80, 28,408.86 and 15,000.60

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Solution

The fourth proportional to 20,587.80, 28,408.86 and 15,000.60 is: 20,699.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.80 : 28,408.86 = 15,000.60 : x
  2. Step 2: Convert to fraction form
    20,587.80/28,408.86 = 15,000.60/x
  3. Step 3: Cross multiply
    20,587.80x = 28,408.86 × 15,000.60
  4. Step 4: Simplify right side
    20,587.80x = 426,149,945.32
  5. Step 5: Solve for x
    x = 426,149,945.32/20,587.80
  6. Step 6: Final answer
    x = 20,699.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.