Home / 20,705.60-31,015.20-15,504.32

Finding the Fourth Proportional to 20,705.60, 31,015.20 and 15,504.32

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Solution

The fourth proportional to 20,705.60, 31,015.20 and 15,504.32 is: 23,224.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.60 : 31,015.20 = 15,504.32 : x
  2. Step 2: Convert to fraction form
    20,705.60/31,015.20 = 15,504.32/x
  3. Step 3: Cross multiply
    20,705.60x = 31,015.20 × 15,504.32
  4. Step 4: Simplify right side
    20,705.60x = 480,869,585.66
  5. Step 5: Solve for x
    x = 480,869,585.66/20,705.60
  6. Step 6: Final answer
    x = 23,224.13

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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.