Home / 15,431.80-21,295.52-8,717.21

Finding the Fourth Proportional to 15,431.80, 21,295.52 and 8,717.21

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Solution

The fourth proportional to 15,431.80, 21,295.52 and 8,717.21 is: 12,029.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.80 : 21,295.52 = 8,717.21 : x
  2. Step 2: Convert to fraction form
    15,431.80/21,295.52 = 8,717.21/x
  3. Step 3: Cross multiply
    15,431.80x = 21,295.52 × 8,717.21
  4. Step 4: Simplify right side
    15,431.80x = 185,637,519.90
  5. Step 5: Solve for x
    x = 185,637,519.90/15,431.80
  6. Step 6: Final answer
    x = 12,029.54

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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.