Home / 20,704.40-31,056.60-13,317.20

Finding the Fourth Proportional to 20,704.40, 31,056.60 and 13,317.20

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Solution

The fourth proportional to 20,704.40, 31,056.60 and 13,317.20 is: 19,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.40 : 31,056.60 = 13,317.20 : x
  2. Step 2: Convert to fraction form
    20,704.40/31,056.60 = 13,317.20/x
  3. Step 3: Cross multiply
    20,704.40x = 31,056.60 × 13,317.20
  4. Step 4: Simplify right side
    20,704.40x = 413,586,953.52
  5. Step 5: Solve for x
    x = 413,586,953.52/20,704.40
  6. Step 6: Final answer
    x = 19,975.80

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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.