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Finding the Fourth Proportional to 15,074.25, 20,802.47 and 8,785.41

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Solution

The fourth proportional to 15,074.25, 20,802.47 and 8,785.41 is: 12,123.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,074.25 : 20,802.47 = 8,785.41 : x
  2. Step 2: Convert to fraction form
    15,074.25/20,802.47 = 8,785.41/x
  3. Step 3: Cross multiply
    15,074.25x = 20,802.47 × 8,785.41
  4. Step 4: Simplify right side
    15,074.25x = 182,758,184.04
  5. Step 5: Solve for x
    x = 182,758,184.04/15,074.25
  6. Step 6: Final answer
    x = 12,123.87

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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.