Home / 21,025.50-31,473.84-13,615.21

Finding the Fourth Proportional to 21,025.50, 31,473.84 and 13,615.21

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Solution

The fourth proportional to 21,025.50, 31,473.84 and 13,615.21 is: 20,381.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025.50 : 31,473.84 = 13,615.21 : x
  2. Step 2: Convert to fraction form
    21,025.50/31,473.84 = 13,615.21/x
  3. Step 3: Cross multiply
    21,025.50x = 31,473.84 × 13,615.21
  4. Step 4: Simplify right side
    21,025.50x = 428,522,941.11
  5. Step 5: Solve for x
    x = 428,522,941.11/21,025.50
  6. Step 6: Final answer
    x = 20,381.11

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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.