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Finding the Fourth Proportional to 18,891.78, 28,300.68 and 14,487.68

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Solution

The fourth proportional to 18,891.78, 28,300.68 and 14,487.68 is: 21,703.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.78 : 28,300.68 = 14,487.68 : x
  2. Step 2: Convert to fraction form
    18,891.78/28,300.68 = 14,487.68/x
  3. Step 3: Cross multiply
    18,891.78x = 28,300.68 × 14,487.68
  4. Step 4: Simplify right side
    18,891.78x = 410,011,054.12
  5. Step 5: Solve for x
    x = 410,011,054.12/18,891.78
  6. Step 6: Final answer
    x = 21,703.15

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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.