Home / 15,395.28-21,245.64-8,321.84

Finding the Fourth Proportional to 15,395.28, 21,245.64 and 8,321.84

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Solution

The fourth proportional to 15,395.28, 21,245.64 and 8,321.84 is: 11,484.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,395.28 : 21,245.64 = 8,321.84 : x
  2. Step 2: Convert to fraction form
    15,395.28/21,245.64 = 8,321.84/x
  3. Step 3: Cross multiply
    15,395.28x = 21,245.64 × 8,321.84
  4. Step 4: Simplify right side
    15,395.28x = 176,802,816.78
  5. Step 5: Solve for x
    x = 176,802,816.78/15,395.28
  6. Step 6: Final answer
    x = 11,484.22

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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.