Home / 20,908.60-31,314.30-13,035.40

Finding the Fourth Proportional to 20,908.60, 31,314.30 and 13,035.40

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Solution

The fourth proportional to 20,908.60, 31,314.30 and 13,035.40 is: 19,522.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.60 : 31,314.30 = 13,035.40 : x
  2. Step 2: Convert to fraction form
    20,908.60/31,314.30 = 13,035.40/x
  3. Step 3: Cross multiply
    20,908.60x = 31,314.30 × 13,035.40
  4. Step 4: Simplify right side
    20,908.60x = 408,194,426.22
  5. Step 5: Solve for x
    x = 408,194,426.22/20,908.60
  6. Step 6: Final answer
    x = 19,522.80

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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.