Home / 31,621.20-43,586.56-21,409.04

Finding the Fourth Proportional to 31,621.20, 43,586.56 and 21,409.04

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Solution

The fourth proportional to 31,621.20, 43,586.56 and 21,409.04 is: 29,510.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,621.20 : 43,586.56 = 21,409.04 : x
  2. Step 2: Convert to fraction form
    31,621.20/43,586.56 = 21,409.04/x
  3. Step 3: Cross multiply
    31,621.20x = 43,586.56 × 21,409.04
  4. Step 4: Simplify right side
    31,621.20x = 933,146,406.50
  5. Step 5: Solve for x
    x = 933,146,406.50/31,621.20
  6. Step 6: Final answer
    x = 29,510.15

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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.