Home / 21,203.58-31,804.56-8,720.13

Finding the Fourth Proportional to 21,203.58, 31,804.56 and 8,720.13

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Solution

The fourth proportional to 21,203.58, 31,804.56 and 8,720.13 is: 13,079.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.58 : 31,804.56 = 8,720.13 : x
  2. Step 2: Convert to fraction form
    21,203.58/31,804.56 = 8,720.13/x
  3. Step 3: Cross multiply
    21,203.58x = 31,804.56 × 8,720.13
  4. Step 4: Simplify right side
    21,203.58x = 277,339,897.79
  5. Step 5: Solve for x
    x = 277,339,897.79/21,203.58
  6. Step 6: Final answer
    x = 13,079.86

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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.