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Finding the Fourth Proportional to 21,479.44, 32,212.68 and 12,712

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Solution

The fourth proportional to 21,479.44, 32,212.68 and 12,712 is: 19,064.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,479.44 : 32,212.68 = 12,712 : x
  2. Step 2: Convert to fraction form
    21,479.44/32,212.68 = 12,712/x
  3. Step 3: Cross multiply
    21,479.44x = 32,212.68 × 12,712
  4. Step 4: Simplify right side
    21,479.44x = 409,487,588.16
  5. Step 5: Solve for x
    x = 409,487,588.16/21,479.44
  6. Step 6: Final answer
    x = 19,064.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.