Home / 21,155.43-31,724.95-11,289.33

Finding the Fourth Proportional to 21,155.43, 31,724.95 and 11,289.33

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Solution

The fourth proportional to 21,155.43, 31,724.95 and 11,289.33 is: 16,929.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.43 : 31,724.95 = 11,289.33 : x
  2. Step 2: Convert to fraction form
    21,155.43/31,724.95 = 11,289.33/x
  3. Step 3: Cross multiply
    21,155.43x = 31,724.95 × 11,289.33
  4. Step 4: Simplify right side
    21,155.43x = 358,153,401.56
  5. Step 5: Solve for x
    x = 358,153,401.56/21,155.43
  6. Step 6: Final answer
    x = 16,929.62

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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.