Home / 12,972.14-19,445.75-8,278.90

Finding the Fourth Proportional to 12,972.14, 19,445.75 and 8,278.90

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Solution

The fourth proportional to 12,972.14, 19,445.75 and 8,278.90 is: 12,410.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,972.14 : 19,445.75 = 8,278.90 : x
  2. Step 2: Convert to fraction form
    12,972.14/19,445.75 = 8,278.90/x
  3. Step 3: Cross multiply
    12,972.14x = 19,445.75 × 8,278.90
  4. Step 4: Simplify right side
    12,972.14x = 160,989,391.76
  5. Step 5: Solve for x
    x = 160,989,391.76/12,972.14
  6. Step 6: Final answer
    x = 12,410.40

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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.