Home / 8,720.20-13,055.66-8,031.28

Finding the Fourth Proportional to 8,720.20, 13,055.66 and 8,031.28

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Solution

The fourth proportional to 8,720.20, 13,055.66 and 8,031.28 is: 12,024.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.20 : 13,055.66 = 8,031.28 : x
  2. Step 2: Convert to fraction form
    8,720.20/13,055.66 = 8,031.28/x
  3. Step 3: Cross multiply
    8,720.20x = 13,055.66 × 8,031.28
  4. Step 4: Simplify right side
    8,720.20x = 104,853,661.04
  5. Step 5: Solve for x
    x = 104,853,661.04/8,720.20
  6. Step 6: Final answer
    x = 12,024.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.