Home / 21,207.36-31,811.12-7,356.40

Finding the Fourth Proportional to 21,207.36, 31,811.12 and 7,356.40

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Solution

The fourth proportional to 21,207.36, 31,811.12 and 7,356.40 is: 11,034.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.36 : 31,811.12 = 7,356.40 : x
  2. Step 2: Convert to fraction form
    21,207.36/31,811.12 = 7,356.40/x
  3. Step 3: Cross multiply
    21,207.36x = 31,811.12 × 7,356.40
  4. Step 4: Simplify right side
    21,207.36x = 234,015,323.17
  5. Step 5: Solve for x
    x = 234,015,323.17/21,207.36
  6. Step 6: Final answer
    x = 11,034.63

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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.