Home / 21,039.52-31,560.24-7,887.52

Finding the Fourth Proportional to 21,039.52, 31,560.24 and 7,887.52

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Solution

The fourth proportional to 21,039.52, 31,560.24 and 7,887.52 is: 11,831.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.52 : 31,560.24 = 7,887.52 : x
  2. Step 2: Convert to fraction form
    21,039.52/31,560.24 = 7,887.52/x
  3. Step 3: Cross multiply
    21,039.52x = 31,560.24 × 7,887.52
  4. Step 4: Simplify right side
    21,039.52x = 248,932,024.20
  5. Step 5: Solve for x
    x = 248,932,024.20/21,039.52
  6. Step 6: Final answer
    x = 11,831.64

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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.