Home / 21,439.98-32,124.78-20,619.90

Finding the Fourth Proportional to 21,439.98, 32,124.78 and 20,619.90

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Solution

The fourth proportional to 21,439.98, 32,124.78 and 20,619.90 is: 30,896.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.98 : 32,124.78 = 20,619.90 : x
  2. Step 2: Convert to fraction form
    21,439.98/32,124.78 = 20,619.90/x
  3. Step 3: Cross multiply
    21,439.98x = 32,124.78 × 20,619.90
  4. Step 4: Simplify right side
    21,439.98x = 662,409,751.12
  5. Step 5: Solve for x
    x = 662,409,751.12/21,439.98
  6. Step 6: Final answer
    x = 30,896.01

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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.