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Finding the Fourth Proportional to 11,479.84, 15,820.56 and 8,287.52

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Solution

The fourth proportional to 11,479.84, 15,820.56 and 8,287.52 is: 11,421.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,479.84 : 15,820.56 = 8,287.52 : x
  2. Step 2: Convert to fraction form
    11,479.84/15,820.56 = 8,287.52/x
  3. Step 3: Cross multiply
    11,479.84x = 15,820.56 × 8,287.52
  4. Step 4: Simplify right side
    11,479.84x = 131,113,207.41
  5. Step 5: Solve for x
    x = 131,113,207.41/11,479.84
  6. Step 6: Final answer
    x = 11,421.17

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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.