Home / 13,107.13-18,088.04-7,138.79

Finding the Fourth Proportional to 13,107.13, 18,088.04 and 7,138.79

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Solution

The fourth proportional to 13,107.13, 18,088.04 and 7,138.79 is: 9,851.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.13 : 18,088.04 = 7,138.79 : x
  2. Step 2: Convert to fraction form
    13,107.13/18,088.04 = 7,138.79/x
  3. Step 3: Cross multiply
    13,107.13x = 18,088.04 × 7,138.79
  4. Step 4: Simplify right side
    13,107.13x = 129,126,719.07
  5. Step 5: Solve for x
    x = 129,126,719.07/13,107.13
  6. Step 6: Final answer
    x = 9,851.64

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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.