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Finding the Fourth Proportional to 21,398.62, 32,080.53 and 8,927.93

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Solution

The fourth proportional to 21,398.62, 32,080.53 and 8,927.93 is: 13,384.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.62 : 32,080.53 = 8,927.93 : x
  2. Step 2: Convert to fraction form
    21,398.62/32,080.53 = 8,927.93/x
  3. Step 3: Cross multiply
    21,398.62x = 32,080.53 × 8,927.93
  4. Step 4: Simplify right side
    21,398.62x = 286,412,748.52
  5. Step 5: Solve for x
    x = 286,412,748.52/21,398.62
  6. Step 6: Final answer
    x = 13,384.64

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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.