Home / 13,099.70-18,077.45-7,131.35

Finding the Fourth Proportional to 13,099.70, 18,077.45 and 7,131.35

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Solution

The fourth proportional to 13,099.70, 18,077.45 and 7,131.35 is: 9,841.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,099.70 : 18,077.45 = 7,131.35 : x
  2. Step 2: Convert to fraction form
    13,099.70/18,077.45 = 7,131.35/x
  3. Step 3: Cross multiply
    13,099.70x = 18,077.45 × 7,131.35
  4. Step 4: Simplify right side
    13,099.70x = 128,916,497.01
  5. Step 5: Solve for x
    x = 128,916,497.01/13,099.70
  6. Step 6: Final answer
    x = 9,841.18

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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.