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Finding the Fourth Proportional to 15,479.19, 21,357.74 and 8,763.88

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Solution

The fourth proportional to 15,479.19, 21,357.74 and 8,763.88 is: 12,092.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.19 : 21,357.74 = 8,763.88 : x
  2. Step 2: Convert to fraction form
    15,479.19/21,357.74 = 8,763.88/x
  3. Step 3: Cross multiply
    15,479.19x = 21,357.74 × 8,763.88
  4. Step 4: Simplify right side
    15,479.19x = 187,176,670.43
  5. Step 5: Solve for x
    x = 187,176,670.43/15,479.19
  6. Step 6: Final answer
    x = 12,092.15

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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.