Home / 21,187.16-31,791.06-8,710.93

Finding the Fourth Proportional to 21,187.16, 31,791.06 and 8,710.93

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Solution

The fourth proportional to 21,187.16, 31,791.06 and 8,710.93 is: 13,070.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.16 : 31,791.06 = 8,710.93 : x
  2. Step 2: Convert to fraction form
    21,187.16/31,791.06 = 8,710.93/x
  3. Step 3: Cross multiply
    21,187.16x = 31,791.06 × 8,710.93
  4. Step 4: Simplify right side
    21,187.16x = 276,929,698.29
  5. Step 5: Solve for x
    x = 276,929,698.29/21,187.16
  6. Step 6: Final answer
    x = 13,070.64

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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.