Home / 13,512.16-18,648.40-8,208.80

Finding the Fourth Proportional to 13,512.16, 18,648.40 and 8,208.80

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Solution

The fourth proportional to 13,512.16, 18,648.40 and 8,208.80 is: 11,329.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,512.16 : 18,648.40 = 8,208.80 : x
  2. Step 2: Convert to fraction form
    13,512.16/18,648.40 = 8,208.80/x
  3. Step 3: Cross multiply
    13,512.16x = 18,648.40 × 8,208.80
  4. Step 4: Simplify right side
    13,512.16x = 153,080,985.92
  5. Step 5: Solve for x
    x = 153,080,985.92/13,512.16
  6. Step 6: Final answer
    x = 11,329.13

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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.