Home / 11,399.18-15,718.47-7,412.90

Finding the Fourth Proportional to 11,399.18, 15,718.47 and 7,412.90

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Solution

The fourth proportional to 11,399.18, 15,718.47 and 7,412.90 is: 10,221.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,399.18 : 15,718.47 = 7,412.90 : x
  2. Step 2: Convert to fraction form
    11,399.18/15,718.47 = 7,412.90/x
  3. Step 3: Cross multiply
    11,399.18x = 15,718.47 × 7,412.90
  4. Step 4: Simplify right side
    11,399.18x = 116,519,446.26
  5. Step 5: Solve for x
    x = 116,519,446.26/11,399.18
  6. Step 6: Final answer
    x = 10,221.74

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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.