Home / 12,787.96-19,156.28-10,159.78

Finding the Fourth Proportional to 12,787.96, 19,156.28 and 10,159.78

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Solution

The fourth proportional to 12,787.96, 19,156.28 and 10,159.78 is: 15,219.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.96 : 19,156.28 = 10,159.78 : x
  2. Step 2: Convert to fraction form
    12,787.96/19,156.28 = 10,159.78/x
  3. Step 3: Cross multiply
    12,787.96x = 19,156.28 × 10,159.78
  4. Step 4: Simplify right side
    12,787.96x = 194,623,590.42
  5. Step 5: Solve for x
    x = 194,623,590.42/12,787.96
  6. Step 6: Final answer
    x = 15,219.28

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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.