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Finding the Fourth Proportional to 12,865.95, 19,278.99 and 8,924.87

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Solution

The fourth proportional to 12,865.95, 19,278.99 and 8,924.87 is: 13,373.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,865.95 : 19,278.99 = 8,924.87 : x
  2. Step 2: Convert to fraction form
    12,865.95/19,278.99 = 8,924.87/x
  3. Step 3: Cross multiply
    12,865.95x = 19,278.99 × 8,924.87
  4. Step 4: Simplify right side
    12,865.95x = 172,062,383.09
  5. Step 5: Solve for x
    x = 172,062,383.09/12,865.95
  6. Step 6: Final answer
    x = 13,373.47

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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.