Home / 20,479.80-28,255.08-12,416.06

Finding the Fourth Proportional to 20,479.80, 28,255.08 and 12,416.06

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Solution

The fourth proportional to 20,479.80, 28,255.08 and 12,416.06 is: 17,129.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.80 : 28,255.08 = 12,416.06 : x
  2. Step 2: Convert to fraction form
    20,479.80/28,255.08 = 12,416.06/x
  3. Step 3: Cross multiply
    20,479.80x = 28,255.08 × 12,416.06
  4. Step 4: Simplify right side
    20,479.80x = 350,816,627.31
  5. Step 5: Solve for x
    x = 350,816,627.31/20,479.80
  6. Step 6: Final answer
    x = 17,129.89

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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.