Home / 21,327.90-31,991.85-7,288.05

Finding the Fourth Proportional to 21,327.90, 31,991.85 and 7,288.05

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Solution

The fourth proportional to 21,327.90, 31,991.85 and 7,288.05 is: 10,932.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.90 : 31,991.85 = 7,288.05 : x
  2. Step 2: Convert to fraction form
    21,327.90/31,991.85 = 7,288.05/x
  3. Step 3: Cross multiply
    21,327.90x = 31,991.85 × 7,288.05
  4. Step 4: Simplify right side
    21,327.90x = 233,158,124.19
  5. Step 5: Solve for x
    x = 233,158,124.19/21,327.90
  6. Step 6: Final answer
    x = 10,932.07

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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.