Home / 12,963.90-19,455.45-5,178.30

Finding the Fourth Proportional to 12,963.90, 19,455.45 and 5,178.30

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Solution

The fourth proportional to 12,963.90, 19,455.45 and 5,178.30 is: 7,771.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,963.90 : 19,455.45 = 5,178.30 : x
  2. Step 2: Convert to fraction form
    12,963.90/19,455.45 = 5,178.30/x
  3. Step 3: Cross multiply
    12,963.90x = 19,455.45 × 5,178.30
  4. Step 4: Simplify right side
    12,963.90x = 100,746,156.74
  5. Step 5: Solve for x
    x = 100,746,156.74/12,963.90
  6. Step 6: Final answer
    x = 7,771.28

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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.