Home / 15,816.56-21,825.68-8,742.88

Finding the Fourth Proportional to 15,816.56, 21,825.68 and 8,742.88

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Solution

The fourth proportional to 15,816.56, 21,825.68 and 8,742.88 is: 12,064.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,816.56 : 21,825.68 = 8,742.88 : x
  2. Step 2: Convert to fraction form
    15,816.56/21,825.68 = 8,742.88/x
  3. Step 3: Cross multiply
    15,816.56x = 21,825.68 × 8,742.88
  4. Step 4: Simplify right side
    15,816.56x = 190,819,301.16
  5. Step 5: Solve for x
    x = 190,819,301.16/15,816.56
  6. Step 6: Final answer
    x = 12,064.53

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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.