Home / 10,720.80-16,097.36-8,755.20

Finding the Fourth Proportional to 10,720.80, 16,097.36 and 8,755.20

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Solution

The fourth proportional to 10,720.80, 16,097.36 and 8,755.20 is: 13,146.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,720.80 : 16,097.36 = 8,755.20 : x
  2. Step 2: Convert to fraction form
    10,720.80/16,097.36 = 8,755.20/x
  3. Step 3: Cross multiply
    10,720.80x = 16,097.36 × 8,755.20
  4. Step 4: Simplify right side
    10,720.80x = 140,935,606.27
  5. Step 5: Solve for x
    x = 140,935,606.27/10,720.80
  6. Step 6: Final answer
    x = 13,146.00

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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.