Home / 15,795.52-21,797.42-8,721.78

Finding the Fourth Proportional to 15,795.52, 21,797.42 and 8,721.78

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Solution

The fourth proportional to 15,795.52, 21,797.42 and 8,721.78 is: 12,035.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,795.52 : 21,797.42 = 8,721.78 : x
  2. Step 2: Convert to fraction form
    15,795.52/21,797.42 = 8,721.78/x
  3. Step 3: Cross multiply
    15,795.52x = 21,797.42 × 8,721.78
  4. Step 4: Simplify right side
    15,795.52x = 190,112,301.81
  5. Step 5: Solve for x
    x = 190,112,301.81/15,795.52
  6. Step 6: Final answer
    x = 12,035.84

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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.