Home / 20,424.56-28,185.18-12,480.08

Finding the Fourth Proportional to 20,424.56, 28,185.18 and 12,480.08

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Solution

The fourth proportional to 20,424.56, 28,185.18 and 12,480.08 is: 17,222.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,424.56 : 28,185.18 = 12,480.08 : x
  2. Step 2: Convert to fraction form
    20,424.56/28,185.18 = 12,480.08/x
  3. Step 3: Cross multiply
    20,424.56x = 28,185.18 × 12,480.08
  4. Step 4: Simplify right side
    20,424.56x = 351,753,301.21
  5. Step 5: Solve for x
    x = 351,753,301.21/20,424.56
  6. Step 6: Final answer
    x = 17,222.07

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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.