Home / 15,255.28-21,051.16-8,539.36

Finding the Fourth Proportional to 15,255.28, 21,051.16 and 8,539.36

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Solution

The fourth proportional to 15,255.28, 21,051.16 and 8,539.36 is: 11,783.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,255.28 : 21,051.16 = 8,539.36 : x
  2. Step 2: Convert to fraction form
    15,255.28/21,051.16 = 8,539.36/x
  3. Step 3: Cross multiply
    15,255.28x = 21,051.16 × 8,539.36
  4. Step 4: Simplify right side
    15,255.28x = 179,763,433.66
  5. Step 5: Solve for x
    x = 179,763,433.66/15,255.28
  6. Step 6: Final answer
    x = 11,783.69

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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.