Home / 20,987.60-28,962.23-12,487.77

Finding the Fourth Proportional to 20,987.60, 28,962.23 and 12,487.77

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Solution

The fourth proportional to 20,987.60, 28,962.23 and 12,487.77 is: 17,232.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.60 : 28,962.23 = 12,487.77 : x
  2. Step 2: Convert to fraction form
    20,987.60/28,962.23 = 12,487.77/x
  3. Step 3: Cross multiply
    20,987.60x = 28,962.23 × 12,487.77
  4. Step 4: Simplify right side
    20,987.60x = 361,673,604.49
  5. Step 5: Solve for x
    x = 361,673,604.49/20,987.60
  6. Step 6: Final answer
    x = 17,232.73

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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.