Home / 13,137.18-18,128.70-7,169.10

Finding the Fourth Proportional to 13,137.18, 18,128.70 and 7,169.10

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Solution

The fourth proportional to 13,137.18, 18,128.70 and 7,169.10 is: 9,893.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.18 : 18,128.70 = 7,169.10 : x
  2. Step 2: Convert to fraction form
    13,137.18/18,128.70 = 7,169.10/x
  3. Step 3: Cross multiply
    13,137.18x = 18,128.70 × 7,169.10
  4. Step 4: Simplify right side
    13,137.18x = 129,966,463.17
  5. Step 5: Solve for x
    x = 129,966,463.17/13,137.18
  6. Step 6: Final answer
    x = 9,893.03

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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.