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Finding the Fourth Proportional to 15,479.16, 21,361.50 and 8,764.61

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Solution

The fourth proportional to 15,479.16, 21,361.50 and 8,764.61 is: 12,095.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.16 : 21,361.50 = 8,764.61 : x
  2. Step 2: Convert to fraction form
    15,479.16/21,361.50 = 8,764.61/x
  3. Step 3: Cross multiply
    15,479.16x = 21,361.50 × 8,764.61
  4. Step 4: Simplify right side
    15,479.16x = 187,225,172.69
  5. Step 5: Solve for x
    x = 187,225,172.69/15,479.16
  6. Step 6: Final answer
    x = 12,095.31

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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.