Home / 20,967.35-31,420.13-15,677.55

Finding the Fourth Proportional to 20,967.35, 31,420.13 and 15,677.55

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Solution

The fourth proportional to 20,967.35, 31,420.13 and 15,677.55 is: 23,493.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.35 : 31,420.13 = 15,677.55 : x
  2. Step 2: Convert to fraction form
    20,967.35/31,420.13 = 15,677.55/x
  3. Step 3: Cross multiply
    20,967.35x = 31,420.13 × 15,677.55
  4. Step 4: Simplify right side
    20,967.35x = 492,590,580.69
  5. Step 5: Solve for x
    x = 492,590,580.69/20,967.35
  6. Step 6: Final answer
    x = 23,493.23

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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.