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Finding the Fourth Proportional to 18,697.60, 28,056 and 12,462.08

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Solution

The fourth proportional to 18,697.60, 28,056 and 12,462.08 is: 18,699.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.60 : 28,056 = 12,462.08 : x
  2. Step 2: Convert to fraction form
    18,697.60/28,056 = 12,462.08/x
  3. Step 3: Cross multiply
    18,697.60x = 28,056 × 12,462.08
  4. Step 4: Simplify right side
    18,697.60x = 349,636,116.48
  5. Step 5: Solve for x
    x = 349,636,116.48/18,697.60
  6. Step 6: Final answer
    x = 18,699.52

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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.