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Finding the Fourth Proportional to 12,963.90, 19,445.85 and 12,866.70

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Solution

The fourth proportional to 12,963.90, 19,445.85 and 12,866.70 is: 19,300.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,963.90 : 19,445.85 = 12,866.70 : x
  2. Step 2: Convert to fraction form
    12,963.90/19,445.85 = 12,866.70/x
  3. Step 3: Cross multiply
    12,963.90x = 19,445.85 × 12,866.70
  4. Step 4: Simplify right side
    12,963.90x = 250,203,918.20
  5. Step 5: Solve for x
    x = 250,203,918.20/12,963.90
  6. Step 6: Final answer
    x = 19,300.05

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Similar ratio
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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.