Home / 12,963.79-19,445.64-5,178.07

Finding the Fourth Proportional to 12,963.79, 19,445.64 and 5,178.07

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Solution

The fourth proportional to 12,963.79, 19,445.64 and 5,178.07 is: 7,767.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,963.79 : 19,445.64 = 5,178.07 : x
  2. Step 2: Convert to fraction form
    12,963.79/19,445.64 = 5,178.07/x
  3. Step 3: Cross multiply
    12,963.79x = 19,445.64 × 5,178.07
  4. Step 4: Simplify right side
    12,963.79x = 100,690,885.11
  5. Step 5: Solve for x
    x = 100,690,885.11/12,963.79
  6. Step 6: Final answer
    x = 7,767.09

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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.