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Finding the Fourth Proportional to 30,456.80, 45,678.92 and 11,730.41

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Solution

The fourth proportional to 30,456.80, 45,678.92 and 11,730.41 is: 17,593.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,456.80 : 45,678.92 = 11,730.41 : x
  2. Step 2: Convert to fraction form
    30,456.80/45,678.92 = 11,730.41/x
  3. Step 3: Cross multiply
    30,456.80x = 45,678.92 × 11,730.41
  4. Step 4: Simplify right side
    30,456.80x = 535,832,172.91
  5. Step 5: Solve for x
    x = 535,832,172.91/30,456.80
  6. Step 6: Final answer
    x = 17,593.19

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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.