Home / 20,762.48-28,652.28-12,378.80

Finding the Fourth Proportional to 20,762.48, 28,652.28 and 12,378.80

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Solution

The fourth proportional to 20,762.48, 28,652.28 and 12,378.80 is: 17,082.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.48 : 28,652.28 = 12,378.80 : x
  2. Step 2: Convert to fraction form
    20,762.48/28,652.28 = 12,378.80/x
  3. Step 3: Cross multiply
    20,762.48x = 28,652.28 × 12,378.80
  4. Step 4: Simplify right side
    20,762.48x = 354,680,843.66
  5. Step 5: Solve for x
    x = 354,680,843.66/20,762.48
  6. Step 6: Final answer
    x = 17,082.78

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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.