Home / 21,405.64-32,100.36-10,309.72

Finding the Fourth Proportional to 21,405.64, 32,100.36 and 10,309.72

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Solution

The fourth proportional to 21,405.64, 32,100.36 and 10,309.72 is: 15,460.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.64 : 32,100.36 = 10,309.72 : x
  2. Step 2: Convert to fraction form
    21,405.64/32,100.36 = 10,309.72/x
  3. Step 3: Cross multiply
    21,405.64x = 32,100.36 × 10,309.72
  4. Step 4: Simplify right side
    21,405.64x = 330,945,723.50
  5. Step 5: Solve for x
    x = 330,945,723.50/21,405.64
  6. Step 6: Final answer
    x = 15,460.68

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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.