Home / 21,008.20-31,512.30-9,322.60

Finding the Fourth Proportional to 21,008.20, 31,512.30 and 9,322.60

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Solution

The fourth proportional to 21,008.20, 31,512.30 and 9,322.60 is: 13,983.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.20 : 31,512.30 = 9,322.60 : x
  2. Step 2: Convert to fraction form
    21,008.20/31,512.30 = 9,322.60/x
  3. Step 3: Cross multiply
    21,008.20x = 31,512.30 × 9,322.60
  4. Step 4: Simplify right side
    21,008.20x = 293,776,567.98
  5. Step 5: Solve for x
    x = 293,776,567.98/21,008.20
  6. Step 6: Final answer
    x = 13,983.90

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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.