Home / 15,744.84-21,728.08-8,671.78

Finding the Fourth Proportional to 15,744.84, 21,728.08 and 8,671.78

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Solution

The fourth proportional to 15,744.84, 21,728.08 and 8,671.78 is: 11,967.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,744.84 : 21,728.08 = 8,671.78 : x
  2. Step 2: Convert to fraction form
    15,744.84/21,728.08 = 8,671.78/x
  3. Step 3: Cross multiply
    15,744.84x = 21,728.08 × 8,671.78
  4. Step 4: Simplify right side
    15,744.84x = 188,421,129.58
  5. Step 5: Solve for x
    x = 188,421,129.58/15,744.84
  6. Step 6: Final answer
    x = 11,967.17

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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.