Home / 15,816.20-21,825.59-8,742.47

Finding the Fourth Proportional to 15,816.20, 21,825.59 and 8,742.47

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Solution

The fourth proportional to 15,816.20, 21,825.59 and 8,742.47 is: 12,064.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,816.20 : 21,825.59 = 8,742.47 : x
  2. Step 2: Convert to fraction form
    15,816.20/21,825.59 = 8,742.47/x
  3. Step 3: Cross multiply
    15,816.20x = 21,825.59 × 8,742.47
  4. Step 4: Simplify right side
    15,816.20x = 190,809,412.97
  5. Step 5: Solve for x
    x = 190,809,412.97/15,816.20
  6. Step 6: Final answer
    x = 12,064.18

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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.