Home / 15,821.84-21,833.28-8,747.84

Finding the Fourth Proportional to 15,821.84, 21,833.28 and 8,747.84

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Solution

The fourth proportional to 15,821.84, 21,833.28 and 8,747.84 is: 12,071.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,821.84 : 21,833.28 = 8,747.84 : x
  2. Step 2: Convert to fraction form
    15,821.84/21,833.28 = 8,747.84/x
  3. Step 3: Cross multiply
    15,821.84x = 21,833.28 × 8,747.84
  4. Step 4: Simplify right side
    15,821.84x = 190,994,040.12
  5. Step 5: Solve for x
    x = 190,994,040.12/15,821.84
  6. Step 6: Final answer
    x = 12,071.54

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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.