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Finding the Fourth Proportional to 30,081.47, 45,123.68 and 7,894.89

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Solution

The fourth proportional to 30,081.47, 45,123.68 and 7,894.89 is: 11,842.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,081.47 : 45,123.68 = 7,894.89 : x
  2. Step 2: Convert to fraction form
    30,081.47/45,123.68 = 7,894.89/x
  3. Step 3: Cross multiply
    30,081.47x = 45,123.68 × 7,894.89
  4. Step 4: Simplify right side
    30,081.47x = 356,246,509.73
  5. Step 5: Solve for x
    x = 356,246,509.73/30,081.47
  6. Step 6: Final answer
    x = 11,842.72

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1.5x scale

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.