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Finding the Fourth Proportional to 25,690.76, 38,539.80 and 7,922.91

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Solution

The fourth proportional to 25,690.76, 38,539.80 and 7,922.91 is: 11,885.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,690.76 : 38,539.80 = 7,922.91 : x
  2. Step 2: Convert to fraction form
    25,690.76/38,539.80 = 7,922.91/x
  3. Step 3: Cross multiply
    25,690.76x = 38,539.80 × 7,922.91
  4. Step 4: Simplify right side
    25,690.76x = 305,347,366.82
  5. Step 5: Solve for x
    x = 305,347,366.82/25,690.76
  6. Step 6: Final answer
    x = 11,885.50

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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.