Home / 15,209.16-20,979.89-9,155.19

Finding the Fourth Proportional to 15,209.16, 20,979.89 and 9,155.19

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Solution

The fourth proportional to 15,209.16, 20,979.89 and 9,155.19 is: 12,628.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,209.16 : 20,979.89 = 9,155.19 : x
  2. Step 2: Convert to fraction form
    15,209.16/20,979.89 = 9,155.19/x
  3. Step 3: Cross multiply
    15,209.16x = 20,979.89 × 9,155.19
  4. Step 4: Simplify right side
    15,209.16x = 192,074,833.35
  5. Step 5: Solve for x
    x = 192,074,833.35/15,209.16
  6. Step 6: Final answer
    x = 12,628.89

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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.