Home / 15,905.54-21,945.21-9,943.28

Finding the Fourth Proportional to 15,905.54, 21,945.21 and 9,943.28

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Solution

The fourth proportional to 15,905.54, 21,945.21 and 9,943.28 is: 13,718.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.54 : 21,945.21 = 9,943.28 : x
  2. Step 2: Convert to fraction form
    15,905.54/21,945.21 = 9,943.28/x
  3. Step 3: Cross multiply
    15,905.54x = 21,945.21 × 9,943.28
  4. Step 4: Simplify right side
    15,905.54x = 218,207,367.69
  5. Step 5: Solve for x
    x = 218,207,367.69/15,905.54
  6. Step 6: Final answer
    x = 13,718.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.