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Finding the Fourth Proportional to 15,061.79, 20,785.44 and 8,347.55

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Solution

The fourth proportional to 15,061.79, 20,785.44 and 8,347.55 is: 11,519.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.79 : 20,785.44 = 8,347.55 : x
  2. Step 2: Convert to fraction form
    15,061.79/20,785.44 = 8,347.55/x
  3. Step 3: Cross multiply
    15,061.79x = 20,785.44 × 8,347.55
  4. Step 4: Simplify right side
    15,061.79x = 173,507,551.64
  5. Step 5: Solve for x
    x = 173,507,551.64/15,061.79
  6. Step 6: Final answer
    x = 11,519.71

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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.