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Finding the Fourth Proportional to 18,876.03, 28,319.51 and 7,186.51

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Solution

The fourth proportional to 18,876.03, 28,319.51 and 7,186.51 is: 10,781.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876.03 : 28,319.51 = 7,186.51 : x
  2. Step 2: Convert to fraction form
    18,876.03/28,319.51 = 7,186.51/x
  3. Step 3: Cross multiply
    18,876.03x = 28,319.51 × 7,186.51
  4. Step 4: Simplify right side
    18,876.03x = 203,518,441.81
  5. Step 5: Solve for x
    x = 203,518,441.81/18,876.03
  6. Step 6: Final answer
    x = 10,781.85

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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.