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Finding the Fourth Proportional to 9,972.84, 13,763.70 and 5,781.24

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Solution

The fourth proportional to 9,972.84, 13,763.70 and 5,781.24 is: 7,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,972.84 : 13,763.70 = 5,781.24 : x
  2. Step 2: Convert to fraction form
    9,972.84/13,763.70 = 5,781.24/x
  3. Step 3: Cross multiply
    9,972.84x = 13,763.70 × 5,781.24
  4. Step 4: Simplify right side
    9,972.84x = 79,571,252.99
  5. Step 5: Solve for x
    x = 79,571,252.99/9,972.84
  6. Step 6: Final answer
    x = 7,978.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.