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Finding the Fourth Proportional to 14,918.88, 20,587.66 and 8,205.20

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Solution

The fourth proportional to 14,918.88, 20,587.66 and 8,205.20 is: 11,322.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,918.88 : 20,587.66 = 8,205.20 : x
  2. Step 2: Convert to fraction form
    14,918.88/20,587.66 = 8,205.20/x
  3. Step 3: Cross multiply
    14,918.88x = 20,587.66 × 8,205.20
  4. Step 4: Simplify right side
    14,918.88x = 168,925,744.38
  5. Step 5: Solve for x
    x = 168,925,744.38/14,918.88
  6. Step 6: Final answer
    x = 11,322.95

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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.