Home / 13,113.91-18,097.20-7,145.58

Finding the Fourth Proportional to 13,113.91, 18,097.20 and 7,145.58

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Solution

The fourth proportional to 13,113.91, 18,097.20 and 7,145.58 is: 9,860.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,113.91 : 18,097.20 = 7,145.58 : x
  2. Step 2: Convert to fraction form
    13,113.91/18,097.20 = 7,145.58/x
  3. Step 3: Cross multiply
    13,113.91x = 18,097.20 × 7,145.58
  4. Step 4: Simplify right side
    13,113.91x = 129,315,013.00
  5. Step 5: Solve for x
    x = 129,315,013.00/13,113.91
  6. Step 6: Final answer
    x = 9,860.90

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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.