Home / 9,867.15-13,616.49-5,390.79

Finding the Fourth Proportional to 9,867.15, 13,616.49 and 5,390.79

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Solution

The fourth proportional to 9,867.15, 13,616.49 and 5,390.79 is: 7,439.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,867.15 : 13,616.49 = 5,390.79 : x
  2. Step 2: Convert to fraction form
    9,867.15/13,616.49 = 5,390.79/x
  3. Step 3: Cross multiply
    9,867.15x = 13,616.49 × 5,390.79
  4. Step 4: Simplify right side
    9,867.15x = 73,403,638.13
  5. Step 5: Solve for x
    x = 73,403,638.13/9,867.15
  6. Step 6: Final answer
    x = 7,439.19

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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.