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Finding the Fourth Proportional to 48,456.77, 72,684.90 and 12,921.77

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Solution

The fourth proportional to 48,456.77, 72,684.90 and 12,921.77 is: 19,382.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,456.77 : 72,684.90 = 12,921.77 : x
  2. Step 2: Convert to fraction form
    48,456.77/72,684.90 = 12,921.77/x
  3. Step 3: Cross multiply
    48,456.77x = 72,684.90 × 12,921.77
  4. Step 4: Simplify right side
    48,456.77x = 939,217,741.99
  5. Step 5: Solve for x
    x = 939,217,741.99/48,456.77
  6. Step 6: Final answer
    x = 19,382.59

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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.