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Finding the Fourth Proportional to 19,141.61, 28,712.36 and 7,454.82

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Solution

The fourth proportional to 19,141.61, 28,712.36 and 7,454.82 is: 11,182.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,141.61 : 28,712.36 = 7,454.82 : x
  2. Step 2: Convert to fraction form
    19,141.61/28,712.36 = 7,454.82/x
  3. Step 3: Cross multiply
    19,141.61x = 28,712.36 × 7,454.82
  4. Step 4: Simplify right side
    19,141.61x = 214,045,438.30
  5. Step 5: Solve for x
    x = 214,045,438.30/19,141.61
  6. Step 6: Final answer
    x = 11,182.21

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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.