Home / 13,107.90-18,088.26-7,139.52

Finding the Fourth Proportional to 13,107.90, 18,088.26 and 7,139.52

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Solution

The fourth proportional to 13,107.90, 18,088.26 and 7,139.52 is: 9,852.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.90 : 18,088.26 = 7,139.52 : x
  2. Step 2: Convert to fraction form
    13,107.90/18,088.26 = 7,139.52/x
  3. Step 3: Cross multiply
    13,107.90x = 18,088.26 × 7,139.52
  4. Step 4: Simplify right side
    13,107.90x = 129,141,494.04
  5. Step 5: Solve for x
    x = 129,141,494.04/13,107.90
  6. Step 6: Final answer
    x = 9,852.19

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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.