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Finding the Fourth Proportional to 12,862.53, 19,305.68 and 7,941.78

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Solution

The fourth proportional to 12,862.53, 19,305.68 and 7,941.78 is: 11,920.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,862.53 : 19,305.68 = 7,941.78 : x
  2. Step 2: Convert to fraction form
    12,862.53/19,305.68 = 7,941.78/x
  3. Step 3: Cross multiply
    12,862.53x = 19,305.68 × 7,941.78
  4. Step 4: Simplify right side
    12,862.53x = 153,321,423.60
  5. Step 5: Solve for x
    x = 153,321,423.60/12,862.53
  6. Step 6: Final answer
    x = 11,920.01

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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.