Home / 13,107.18-18,088.23-7,139.17

Finding the Fourth Proportional to 13,107.18, 18,088.23 and 7,139.17

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Solution

The fourth proportional to 13,107.18, 18,088.23 and 7,139.17 is: 9,852.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.18 : 18,088.23 = 7,139.17 : x
  2. Step 2: Convert to fraction form
    13,107.18/18,088.23 = 7,139.17/x
  3. Step 3: Cross multiply
    13,107.18x = 18,088.23 × 7,139.17
  4. Step 4: Simplify right side
    13,107.18x = 129,134,948.97
  5. Step 5: Solve for x
    x = 129,134,948.97/13,107.18
  6. Step 6: Final answer
    x = 9,852.23

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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.