Home / 21,009.76-31,521.84-7,168.48

Finding the Fourth Proportional to 21,009.76, 31,521.84 and 7,168.48

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Solution

The fourth proportional to 21,009.76, 31,521.84 and 7,168.48 is: 10,755.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.76 : 31,521.84 = 7,168.48 : x
  2. Step 2: Convert to fraction form
    21,009.76/31,521.84 = 7,168.48/x
  3. Step 3: Cross multiply
    21,009.76x = 31,521.84 × 7,168.48
  4. Step 4: Simplify right side
    21,009.76x = 225,963,679.60
  5. Step 5: Solve for x
    x = 225,963,679.60/21,009.76
  6. Step 6: Final answer
    x = 10,755.18

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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.