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Finding the Fourth Proportional to 18,869.31, 28,298.90 and 8,988.93

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Solution

The fourth proportional to 18,869.31, 28,298.90 and 8,988.93 is: 13,480.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.31 : 28,298.90 = 8,988.93 : x
  2. Step 2: Convert to fraction form
    18,869.31/28,298.90 = 8,988.93/x
  3. Step 3: Cross multiply
    18,869.31x = 28,298.90 × 8,988.93
  4. Step 4: Simplify right side
    18,869.31x = 254,376,853.65
  5. Step 5: Solve for x
    x = 254,376,853.65/18,869.31
  6. Step 6: Final answer
    x = 13,480.98

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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.