Home / 21,405.47-32,107.59-8,260.68

Finding the Fourth Proportional to 21,405.47, 32,107.59 and 8,260.68

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Solution

The fourth proportional to 21,405.47, 32,107.59 and 8,260.68 is: 12,390.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.47 : 32,107.59 = 8,260.68 : x
  2. Step 2: Convert to fraction form
    21,405.47/32,107.59 = 8,260.68/x
  3. Step 3: Cross multiply
    21,405.47x = 32,107.59 × 8,260.68
  4. Step 4: Simplify right side
    21,405.47x = 265,230,646.96
  5. Step 5: Solve for x
    x = 265,230,646.96/21,405.47
  6. Step 6: Final answer
    x = 12,390.79

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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.