Home / 20,617.16-28,451.76-11,185.80

Finding the Fourth Proportional to 20,617.16, 28,451.76 and 11,185.80

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Solution

The fourth proportional to 20,617.16, 28,451.76 and 11,185.80 is: 15,436.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.16 : 28,451.76 = 11,185.80 : x
  2. Step 2: Convert to fraction form
    20,617.16/28,451.76 = 11,185.80/x
  3. Step 3: Cross multiply
    20,617.16x = 28,451.76 × 11,185.80
  4. Step 4: Simplify right side
    20,617.16x = 318,255,697.01
  5. Step 5: Solve for x
    x = 318,255,697.01/20,617.16
  6. Step 6: Final answer
    x = 15,436.45

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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.