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Finding the Fourth Proportional to 48,291.84, 72,395.88 and 18,689.30

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Solution

The fourth proportional to 48,291.84, 72,395.88 and 18,689.30 is: 28,017.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,291.84 : 72,395.88 = 18,689.30 : x
  2. Step 2: Convert to fraction form
    48,291.84/72,395.88 = 18,689.30/x
  3. Step 3: Cross multiply
    48,291.84x = 72,395.88 × 18,689.30
  4. Step 4: Simplify right side
    48,291.84x = 1,353,028,320.08
  5. Step 5: Solve for x
    x = 1,353,028,320.08/48,291.84
  6. Step 6: Final answer
    x = 28,017.74

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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.