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Finding the Fourth Proportional to 20,414.51, 30,621.49 and 9,885.47

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Solution

The fourth proportional to 20,414.51, 30,621.49 and 9,885.47 is: 14,828.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,414.51 : 30,621.49 = 9,885.47 : x
  2. Step 2: Convert to fraction form
    20,414.51/30,621.49 = 9,885.47/x
  3. Step 3: Cross multiply
    20,414.51x = 30,621.49 × 9,885.47
  4. Step 4: Simplify right side
    20,414.51x = 302,707,872.59
  5. Step 5: Solve for x
    x = 302,707,872.59/20,414.51
  6. Step 6: Final answer
    x = 14,828.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.