Home / 20,975.10-31,462.65-20,168.70

Finding the Fourth Proportional to 20,975.10, 31,462.65 and 20,168.70

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Solution

The fourth proportional to 20,975.10, 31,462.65 and 20,168.70 is: 30,253.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.10 : 31,462.65 = 20,168.70 : x
  2. Step 2: Convert to fraction form
    20,975.10/31,462.65 = 20,168.70/x
  3. Step 3: Cross multiply
    20,975.10x = 31,462.65 × 20,168.70
  4. Step 4: Simplify right side
    20,975.10x = 634,560,749.06
  5. Step 5: Solve for x
    x = 634,560,749.06/20,975.10
  6. Step 6: Final answer
    x = 30,253.05

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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.