Home / 13,107.11-18,088.03-7,138.90

Finding the Fourth Proportional to 13,107.11, 18,088.03 and 7,138.90

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Solution

The fourth proportional to 13,107.11, 18,088.03 and 7,138.90 is: 9,851.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.11 : 18,088.03 = 7,138.90 : x
  2. Step 2: Convert to fraction form
    13,107.11/18,088.03 = 7,138.90/x
  3. Step 3: Cross multiply
    13,107.11x = 18,088.03 × 7,138.90
  4. Step 4: Simplify right side
    13,107.11x = 129,128,601.07
  5. Step 5: Solve for x
    x = 129,128,601.07/13,107.11
  6. Step 6: Final answer
    x = 9,851.80

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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.