Home / 13,107.33-18,088.47-7,139.10

Finding the Fourth Proportional to 13,107.33, 18,088.47 and 7,139.10

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Solution

The fourth proportional to 13,107.33, 18,088.47 and 7,139.10 is: 9,852.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.33 : 18,088.47 = 7,139.10 : x
  2. Step 2: Convert to fraction form
    13,107.33/18,088.47 = 7,139.10/x
  3. Step 3: Cross multiply
    13,107.33x = 18,088.47 × 7,139.10
  4. Step 4: Simplify right side
    13,107.33x = 129,135,396.18
  5. Step 5: Solve for x
    x = 129,135,396.18/13,107.33
  6. Step 6: Final answer
    x = 9,852.15

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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.