Home / 20,948.36-31,380.35-12,602.79

Finding the Fourth Proportional to 20,948.36, 31,380.35 and 12,602.79

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Solution

The fourth proportional to 20,948.36, 31,380.35 and 12,602.79 is: 18,878.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.36 : 31,380.35 = 12,602.79 : x
  2. Step 2: Convert to fraction form
    20,948.36/31,380.35 = 12,602.79/x
  3. Step 3: Cross multiply
    20,948.36x = 31,380.35 × 12,602.79
  4. Step 4: Simplify right side
    20,948.36x = 395,479,898.16
  5. Step 5: Solve for x
    x = 395,479,898.16/20,948.36
  6. Step 6: Final answer
    x = 18,878.80

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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.