Home / 21,221.16-31,783.22-10,135.64

Finding the Fourth Proportional to 21,221.16, 31,783.22 and 10,135.64

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Solution

The fourth proportional to 21,221.16, 31,783.22 and 10,135.64 is: 15,180.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.16 : 31,783.22 = 10,135.64 : x
  2. Step 2: Convert to fraction form
    21,221.16/31,783.22 = 10,135.64/x
  3. Step 3: Cross multiply
    21,221.16x = 31,783.22 × 10,135.64
  4. Step 4: Simplify right side
    21,221.16x = 322,143,275.96
  5. Step 5: Solve for x
    x = 322,143,275.96/21,221.16
  6. Step 6: Final answer
    x = 15,180.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.