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Finding the Fourth Proportional to 13,235.91, 19,862.06 and 7,691.86

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Solution

The fourth proportional to 13,235.91, 19,862.06 and 7,691.86 is: 11,542.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,235.91 : 19,862.06 = 7,691.86 : x
  2. Step 2: Convert to fraction form
    13,235.91/19,862.06 = 7,691.86/x
  3. Step 3: Cross multiply
    13,235.91x = 19,862.06 × 7,691.86
  4. Step 4: Simplify right side
    13,235.91x = 152,776,214.47
  5. Step 5: Solve for x
    x = 152,776,214.47/13,235.91
  6. Step 6: Final answer
    x = 11,542.56

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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.