Home / 20,688.92-31,019.78-13,647.46

Finding the Fourth Proportional to 20,688.92, 31,019.78 and 13,647.46

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Solution

The fourth proportional to 20,688.92, 31,019.78 and 13,647.46 is: 20,462.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.92 : 31,019.78 = 13,647.46 : x
  2. Step 2: Convert to fraction form
    20,688.92/31,019.78 = 13,647.46/x
  3. Step 3: Cross multiply
    20,688.92x = 31,019.78 × 13,647.46
  4. Step 4: Simplify right side
    20,688.92x = 423,341,163.33
  5. Step 5: Solve for x
    x = 423,341,163.33/20,688.92
  6. Step 6: Final answer
    x = 20,462.21

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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.