Home / 15,217.92-20,987.52-9,910.80

Finding the Fourth Proportional to 15,217.92, 20,987.52 and 9,910.80

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Solution

The fourth proportional to 15,217.92, 20,987.52 and 9,910.80 is: 13,668.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,217.92 : 20,987.52 = 9,910.80 : x
  2. Step 2: Convert to fraction form
    15,217.92/20,987.52 = 9,910.80/x
  3. Step 3: Cross multiply
    15,217.92x = 20,987.52 × 9,910.80
  4. Step 4: Simplify right side
    15,217.92x = 208,003,113.22
  5. Step 5: Solve for x
    x = 208,003,113.22/15,217.92
  6. Step 6: Final answer
    x = 13,668.30

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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.