Home / 13,115.93-18,099.95-7,147.64

Finding the Fourth Proportional to 13,115.93, 18,099.95 and 7,147.64

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Solution

The fourth proportional to 13,115.93, 18,099.95 and 7,147.64 is: 9,863.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.93 : 18,099.95 = 7,147.64 : x
  2. Step 2: Convert to fraction form
    13,115.93/18,099.95 = 7,147.64/x
  3. Step 3: Cross multiply
    13,115.93x = 18,099.95 × 7,147.64
  4. Step 4: Simplify right side
    13,115.93x = 129,371,853.99
  5. Step 5: Solve for x
    x = 129,371,853.99/13,115.93
  6. Step 6: Final answer
    x = 9,863.72

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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.