Home / 13,099.28-18,077.44-7,131.20

Finding the Fourth Proportional to 13,099.28, 18,077.44 and 7,131.20

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Solution

The fourth proportional to 13,099.28, 18,077.44 and 7,131.20 is: 9,841.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,099.28 : 18,077.44 = 7,131.20 : x
  2. Step 2: Convert to fraction form
    13,099.28/18,077.44 = 7,131.20/x
  3. Step 3: Cross multiply
    13,099.28x = 18,077.44 × 7,131.20
  4. Step 4: Simplify right side
    13,099.28x = 128,913,840.13
  5. Step 5: Solve for x
    x = 128,913,840.13/13,099.28
  6. Step 6: Final answer
    x = 9,841.29

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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.