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Finding the Fourth Proportional to 19,808.64, 29,695.68 and 7,488

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Solution

The fourth proportional to 19,808.64, 29,695.68 and 7,488 is: 11,225.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,808.64 : 29,695.68 = 7,488 : x
  2. Step 2: Convert to fraction form
    19,808.64/29,695.68 = 7,488/x
  3. Step 3: Cross multiply
    19,808.64x = 29,695.68 × 7,488
  4. Step 4: Simplify right side
    19,808.64x = 222,361,251.84
  5. Step 5: Solve for x
    x = 222,361,251.84/19,808.64
  6. Step 6: Final answer
    x = 11,225.47

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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.