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Finding the Fourth Proportional to 48,438.51, 72,628.04 and 18,821.77

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Solution

The fourth proportional to 48,438.51, 72,628.04 and 18,821.77 is: 28,221.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,438.51 : 72,628.04 = 18,821.77 : x
  2. Step 2: Convert to fraction form
    48,438.51/72,628.04 = 18,821.77/x
  3. Step 3: Cross multiply
    48,438.51x = 72,628.04 × 18,821.77
  4. Step 4: Simplify right side
    48,438.51x = 1,366,988,129.92
  5. Step 5: Solve for x
    x = 1,366,988,129.92/48,438.51
  6. Step 6: Final answer
    x = 28,221.10

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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.