Home / 21,280.88-31,906.51-9,428.22

Finding the Fourth Proportional to 21,280.88, 31,906.51 and 9,428.22

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Solution

The fourth proportional to 21,280.88, 31,906.51 and 9,428.22 is: 14,135.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.88 : 31,906.51 = 9,428.22 : x
  2. Step 2: Convert to fraction form
    21,280.88/31,906.51 = 9,428.22/x
  3. Step 3: Cross multiply
    21,280.88x = 31,906.51 × 9,428.22
  4. Step 4: Simplify right side
    21,280.88x = 300,821,595.71
  5. Step 5: Solve for x
    x = 300,821,595.71/21,280.88
  6. Step 6: Final answer
    x = 14,135.77

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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.