Home / 13,091.24-18,065.90-7,122.90

Finding the Fourth Proportional to 13,091.24, 18,065.90 and 7,122.90

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Solution

The fourth proportional to 13,091.24, 18,065.90 and 7,122.90 is: 9,829.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,091.24 : 18,065.90 = 7,122.90 : x
  2. Step 2: Convert to fraction form
    13,091.24/18,065.90 = 7,122.90/x
  3. Step 3: Cross multiply
    13,091.24x = 18,065.90 × 7,122.90
  4. Step 4: Simplify right side
    13,091.24x = 128,681,616.92
  5. Step 5: Solve for x
    x = 128,681,616.92/13,091.24
  6. Step 6: Final answer
    x = 9,829.60

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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.