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Finding the Fourth Proportional to 18,986.91, 28,482.65 and 7,901.10

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Solution

The fourth proportional to 18,986.91, 28,482.65 and 7,901.10 is: 11,852.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,986.91 : 28,482.65 = 7,901.10 : x
  2. Step 2: Convert to fraction form
    18,986.91/28,482.65 = 7,901.10/x
  3. Step 3: Cross multiply
    18,986.91x = 28,482.65 × 7,901.10
  4. Step 4: Simplify right side
    18,986.91x = 225,044,265.92
  5. Step 5: Solve for x
    x = 225,044,265.92/18,986.91
  6. Step 6: Final answer
    x = 11,852.60

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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.