Home / 21,278.88-31,903.52-9,426.22

Finding the Fourth Proportional to 21,278.88, 31,903.52 and 9,426.22

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Solution

The fourth proportional to 21,278.88, 31,903.52 and 9,426.22 is: 14,132.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.88 : 31,903.52 = 9,426.22 : x
  2. Step 2: Convert to fraction form
    21,278.88/31,903.52 = 9,426.22/x
  3. Step 3: Cross multiply
    21,278.88x = 31,903.52 × 9,426.22
  4. Step 4: Simplify right side
    21,278.88x = 300,729,471.40
  5. Step 5: Solve for x
    x = 300,729,471.40/21,278.88
  6. Step 6: Final answer
    x = 14,132.77

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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.