Home / 20,549.80-28,351.14-13,480.12

Finding the Fourth Proportional to 20,549.80, 28,351.14 and 13,480.12

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Solution

The fourth proportional to 20,549.80, 28,351.14 and 13,480.12 is: 18,597.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,549.80 : 28,351.14 = 13,480.12 : x
  2. Step 2: Convert to fraction form
    20,549.80/28,351.14 = 13,480.12/x
  3. Step 3: Cross multiply
    20,549.80x = 28,351.14 × 13,480.12
  4. Step 4: Simplify right side
    20,549.80x = 382,176,769.34
  5. Step 5: Solve for x
    x = 382,176,769.34/20,549.80
  6. Step 6: Final answer
    x = 18,597.59

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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.