Home / 20,416.74-28,177.65-12,459.30

Finding the Fourth Proportional to 20,416.74, 28,177.65 and 12,459.30

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Solution

The fourth proportional to 20,416.74, 28,177.65 and 12,459.30 is: 17,195.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,416.74 : 28,177.65 = 12,459.30 : x
  2. Step 2: Convert to fraction form
    20,416.74/28,177.65 = 12,459.30/x
  3. Step 3: Cross multiply
    20,416.74x = 28,177.65 × 12,459.30
  4. Step 4: Simplify right side
    20,416.74x = 351,073,794.65
  5. Step 5: Solve for x
    x = 351,073,794.65/20,416.74
  6. Step 6: Final answer
    x = 17,195.39

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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.