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Finding the Fourth Proportional to 15,061.36, 20,784.84 and 8,347.11

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Solution

The fourth proportional to 15,061.36, 20,784.84 and 8,347.11 is: 11,519.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.36 : 20,784.84 = 8,347.11 : x
  2. Step 2: Convert to fraction form
    15,061.36/20,784.84 = 8,347.11/x
  3. Step 3: Cross multiply
    15,061.36x = 20,784.84 × 8,347.11
  4. Step 4: Simplify right side
    15,061.36x = 173,493,304.08
  5. Step 5: Solve for x
    x = 173,493,304.08/15,061.36
  6. Step 6: Final answer
    x = 11,519.10

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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.