Home / 21,611.56-32,420.79-9,131.70

Finding the Fourth Proportional to 21,611.56, 32,420.79 and 9,131.70

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Solution

The fourth proportional to 21,611.56, 32,420.79 and 9,131.70 is: 13,699.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.56 : 32,420.79 = 9,131.70 : x
  2. Step 2: Convert to fraction form
    21,611.56/32,420.79 = 9,131.70/x
  3. Step 3: Cross multiply
    21,611.56x = 32,420.79 × 9,131.70
  4. Step 4: Simplify right side
    21,611.56x = 296,056,928.04
  5. Step 5: Solve for x
    x = 296,056,928.04/21,611.56
  6. Step 6: Final answer
    x = 13,699.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.