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Finding the Fourth Proportional to 18,919.50, 28,335.51 and 18,263.40

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Solution

The fourth proportional to 18,919.50, 28,335.51 and 18,263.40 is: 27,352.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.50 : 28,335.51 = 18,263.40 : x
  2. Step 2: Convert to fraction form
    18,919.50/28,335.51 = 18,263.40/x
  3. Step 3: Cross multiply
    18,919.50x = 28,335.51 × 18,263.40
  4. Step 4: Simplify right side
    18,919.50x = 517,502,869.83
  5. Step 5: Solve for x
    x = 517,502,869.83/18,919.50
  6. Step 6: Final answer
    x = 27,352.88

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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.