Home / 13,107.85-18,088.99-7,139.57

Finding the Fourth Proportional to 13,107.85, 18,088.99 and 7,139.57

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Solution

The fourth proportional to 13,107.85, 18,088.99 and 7,139.57 is: 9,852.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.85 : 18,088.99 = 7,139.57 : x
  2. Step 2: Convert to fraction form
    13,107.85/18,088.99 = 7,139.57/x
  3. Step 3: Cross multiply
    13,107.85x = 18,088.99 × 7,139.57
  4. Step 4: Simplify right side
    13,107.85x = 129,147,502.04
  5. Step 5: Solve for x
    x = 129,147,502.04/13,107.85
  6. Step 6: Final answer
    x = 9,852.69

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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.