Home / 15,209.28-20,986.56-8,923.68

Finding the Fourth Proportional to 15,209.28, 20,986.56 and 8,923.68

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Solution

The fourth proportional to 15,209.28, 20,986.56 and 8,923.68 is: 12,313.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,209.28 : 20,986.56 = 8,923.68 : x
  2. Step 2: Convert to fraction form
    15,209.28/20,986.56 = 8,923.68/x
  3. Step 3: Cross multiply
    15,209.28x = 20,986.56 × 8,923.68
  4. Step 4: Simplify right side
    15,209.28x = 187,277,345.74
  5. Step 5: Solve for x
    x = 187,277,345.74/15,209.28
  6. Step 6: Final answer
    x = 12,313.36

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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.