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Finding the Fourth Proportional to 18,746.70, 28,087.65 and 8,864.70

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Solution

The fourth proportional to 18,746.70, 28,087.65 and 8,864.70 is: 13,281.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,746.70 : 28,087.65 = 8,864.70 : x
  2. Step 2: Convert to fraction form
    18,746.70/28,087.65 = 8,864.70/x
  3. Step 3: Cross multiply
    18,746.70x = 28,087.65 × 8,864.70
  4. Step 4: Simplify right side
    18,746.70x = 248,988,590.96
  5. Step 5: Solve for x
    x = 248,988,590.96/18,746.70
  6. Step 6: Final answer
    x = 13,281.73

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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.