Home / 15,231.76-21,021.36-8,860.32

Finding the Fourth Proportional to 15,231.76, 21,021.36 and 8,860.32

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Solution

The fourth proportional to 15,231.76, 21,021.36 and 8,860.32 is: 12,228.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,231.76 : 21,021.36 = 8,860.32 : x
  2. Step 2: Convert to fraction form
    15,231.76/21,021.36 = 8,860.32/x
  3. Step 3: Cross multiply
    15,231.76x = 21,021.36 × 8,860.32
  4. Step 4: Simplify right side
    15,231.76x = 186,255,976.44
  5. Step 5: Solve for x
    x = 186,255,976.44/15,231.76
  6. Step 6: Final answer
    x = 12,228.13

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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.