Home / 21,290.68-31,903.20-13,483.09

Finding the Fourth Proportional to 21,290.68, 31,903.20 and 13,483.09

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Solution

The fourth proportional to 21,290.68, 31,903.20 and 13,483.09 is: 20,203.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.68 : 31,903.20 = 13,483.09 : x
  2. Step 2: Convert to fraction form
    21,290.68/31,903.20 = 13,483.09/x
  3. Step 3: Cross multiply
    21,290.68x = 31,903.20 × 13,483.09
  4. Step 4: Simplify right side
    21,290.68x = 430,153,716.89
  5. Step 5: Solve for x
    x = 430,153,716.89/21,290.68
  6. Step 6: Final answer
    x = 20,203.85

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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.