Home / 20,071.15-30,125.40-10,217.80

Finding the Fourth Proportional to 20,071.15, 30,125.40 and 10,217.80

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Solution

The fourth proportional to 20,071.15, 30,125.40 and 10,217.80 is: 15,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,071.15 : 30,125.40 = 10,217.80 : x
  2. Step 2: Convert to fraction form
    20,071.15/30,125.40 = 10,217.80/x
  3. Step 3: Cross multiply
    20,071.15x = 30,125.40 × 10,217.80
  4. Step 4: Simplify right side
    20,071.15x = 307,815,368.94
  5. Step 5: Solve for x
    x = 307,815,368.94/20,071.15
  6. Step 6: Final answer
    x = 15,336.21

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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.