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Finding the Fourth Proportional to 21,396, 32,065.72 and 15,492.63

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Solution

The fourth proportional to 21,396, 32,065.72 and 15,492.63 is: 23,218.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,396 : 32,065.72 = 15,492.63 : x
  2. Step 2: Convert to fraction form
    21,396/32,065.72 = 15,492.63/x
  3. Step 3: Cross multiply
    21,396x = 32,065.72 × 15,492.63
  4. Step 4: Simplify right side
    21,396x = 496,782,296.91
  5. Step 5: Solve for x
    x = 496,782,296.91/21,396
  6. Step 6: Final answer
    x = 23,218.47

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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.