Home / 21,420.10-32,131.41-8,272.54

Finding the Fourth Proportional to 21,420.10, 32,131.41 and 8,272.54

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Solution

The fourth proportional to 21,420.10, 32,131.41 and 8,272.54 is: 12,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.10 : 32,131.41 = 8,272.54 : x
  2. Step 2: Convert to fraction form
    21,420.10/32,131.41 = 8,272.54/x
  3. Step 3: Cross multiply
    21,420.10x = 32,131.41 × 8,272.54
  4. Step 4: Simplify right side
    21,420.10x = 265,808,374.48
  5. Step 5: Solve for x
    x = 265,808,374.48/21,420.10
  6. Step 6: Final answer
    x = 12,409.30

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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.