Home / 20,548.80-28,349.76-13,479.12

Finding the Fourth Proportional to 20,548.80, 28,349.76 and 13,479.12

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Solution

The fourth proportional to 20,548.80, 28,349.76 and 13,479.12 is: 18,596.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,548.80 : 28,349.76 = 13,479.12 : x
  2. Step 2: Convert to fraction form
    20,548.80/28,349.76 = 13,479.12/x
  3. Step 3: Cross multiply
    20,548.80x = 28,349.76 × 13,479.12
  4. Step 4: Simplify right side
    20,548.80x = 382,129,817.01
  5. Step 5: Solve for x
    x = 382,129,817.01/20,548.80
  6. Step 6: Final answer
    x = 18,596.21

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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.