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Finding the Fourth Proportional to 30,387.65, 45,597.85 and 14,805.28

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Solution

The fourth proportional to 30,387.65, 45,597.85 and 14,805.28 is: 22,215.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,387.65 : 45,597.85 = 14,805.28 : x
  2. Step 2: Convert to fraction form
    30,387.65/45,597.85 = 14,805.28/x
  3. Step 3: Cross multiply
    30,387.65x = 45,597.85 × 14,805.28
  4. Step 4: Simplify right side
    30,387.65x = 675,088,634.63
  5. Step 5: Solve for x
    x = 675,088,634.63/30,387.65
  6. Step 6: Final answer
    x = 22,215.89

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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.