Home / 13,255.20-18,272.52-9,712.80

Finding the Fourth Proportional to 13,255.20, 18,272.52 and 9,712.80

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Solution

The fourth proportional to 13,255.20, 18,272.52 and 9,712.80 is: 13,389.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,255.20 : 18,272.52 = 9,712.80 : x
  2. Step 2: Convert to fraction form
    13,255.20/18,272.52 = 9,712.80/x
  3. Step 3: Cross multiply
    13,255.20x = 18,272.52 × 9,712.80
  4. Step 4: Simplify right side
    13,255.20x = 177,477,332.26
  5. Step 5: Solve for x
    x = 177,477,332.26/13,255.20
  6. Step 6: Final answer
    x = 13,389.26

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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.