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Finding the Fourth Proportional to 19,245.80, 28,868.70 and 18,079.40

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Solution

The fourth proportional to 19,245.80, 28,868.70 and 18,079.40 is: 27,119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,245.80 : 28,868.70 = 18,079.40 : x
  2. Step 2: Convert to fraction form
    19,245.80/28,868.70 = 18,079.40/x
  3. Step 3: Cross multiply
    19,245.80x = 28,868.70 × 18,079.40
  4. Step 4: Simplify right side
    19,245.80x = 521,928,774.78
  5. Step 5: Solve for x
    x = 521,928,774.78/19,245.80
  6. Step 6: Final answer
    x = 27,119.10

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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.