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Finding the Fourth Proportional to 30,612.65, 45,918.90 and 10,891.98

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Solution

The fourth proportional to 30,612.65, 45,918.90 and 10,891.98 is: 16,337.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,612.65 : 45,918.90 = 10,891.98 : x
  2. Step 2: Convert to fraction form
    30,612.65/45,918.90 = 10,891.98/x
  3. Step 3: Cross multiply
    30,612.65x = 45,918.90 × 10,891.98
  4. Step 4: Simplify right side
    30,612.65x = 500,147,740.42
  5. Step 5: Solve for x
    x = 500,147,740.42/30,612.65
  6. Step 6: Final answer
    x = 16,337.95

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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.