Home / 13,126.32-18,078.12-11,357.28

Finding the Fourth Proportional to 13,126.32, 18,078.12 and 11,357.28

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Solution

The fourth proportional to 13,126.32, 18,078.12 and 11,357.28 is: 15,641.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.32 : 18,078.12 = 11,357.28 : x
  2. Step 2: Convert to fraction form
    13,126.32/18,078.12 = 11,357.28/x
  3. Step 3: Cross multiply
    13,126.32x = 18,078.12 × 11,357.28
  4. Step 4: Simplify right side
    13,126.32x = 205,318,270.71
  5. Step 5: Solve for x
    x = 205,318,270.71/13,126.32
  6. Step 6: Final answer
    x = 15,641.72

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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.