Home / 15,015.90-20,722.74-8,643.46

Finding the Fourth Proportional to 15,015.90, 20,722.74 and 8,643.46

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Solution

The fourth proportional to 15,015.90, 20,722.74 and 8,643.46 is: 11,928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.90 : 20,722.74 = 8,643.46 : x
  2. Step 2: Convert to fraction form
    15,015.90/20,722.74 = 8,643.46/x
  3. Step 3: Cross multiply
    15,015.90x = 20,722.74 × 8,643.46
  4. Step 4: Simplify right side
    15,015.90x = 179,116,174.28
  5. Step 5: Solve for x
    x = 179,116,174.28/15,015.90
  6. Step 6: Final answer
    x = 11,928.43

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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.