Home / 20,960.48-31,451.08-15,438.31

Finding the Fourth Proportional to 20,960.48, 31,451.08 and 15,438.31

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Solution

The fourth proportional to 20,960.48, 31,451.08 and 15,438.31 is: 23,165.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.48 : 31,451.08 = 15,438.31 : x
  2. Step 2: Convert to fraction form
    20,960.48/31,451.08 = 15,438.31/x
  3. Step 3: Cross multiply
    20,960.48x = 31,451.08 × 15,438.31
  4. Step 4: Simplify right side
    20,960.48x = 485,551,522.87
  5. Step 5: Solve for x
    x = 485,551,522.87/20,960.48
  6. Step 6: Final answer
    x = 23,165.10

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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.