Home / 15,791.02-21,791.74-8,717.28

Finding the Fourth Proportional to 15,791.02, 21,791.74 and 8,717.28

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Solution

The fourth proportional to 15,791.02, 21,791.74 and 8,717.28 is: 12,029.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,791.02 : 21,791.74 = 8,717.28 : x
  2. Step 2: Convert to fraction form
    15,791.02/21,791.74 = 8,717.28/x
  3. Step 3: Cross multiply
    15,791.02x = 21,791.74 × 8,717.28
  4. Step 4: Simplify right side
    15,791.02x = 189,964,699.27
  5. Step 5: Solve for x
    x = 189,964,699.27/15,791.02
  6. Step 6: Final answer
    x = 12,029.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.