Home / 21,015.36-31,523.04-7,164

Finding the Fourth Proportional to 21,015.36, 31,523.04 and 7,164

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Solution

The fourth proportional to 21,015.36, 31,523.04 and 7,164 is: 10,746

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.36 : 31,523.04 = 7,164 : x
  2. Step 2: Convert to fraction form
    21,015.36/31,523.04 = 7,164/x
  3. Step 3: Cross multiply
    21,015.36x = 31,523.04 × 7,164
  4. Step 4: Simplify right side
    21,015.36x = 225,831,058.56
  5. Step 5: Solve for x
    x = 225,831,058.56/21,015.36
  6. Step 6: Final answer
    x = 10,746

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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.