Home / 20,890.17-31,188.45-15,933.37

Finding the Fourth Proportional to 20,890.17, 31,188.45 and 15,933.37

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Solution

The fourth proportional to 20,890.17, 31,188.45 and 15,933.37 is: 23,788.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.17 : 31,188.45 = 15,933.37 : x
  2. Step 2: Convert to fraction form
    20,890.17/31,188.45 = 15,933.37/x
  3. Step 3: Cross multiply
    20,890.17x = 31,188.45 × 15,933.37
  4. Step 4: Simplify right side
    20,890.17x = 496,937,153.41
  5. Step 5: Solve for x
    x = 496,937,153.41/20,890.17
  6. Step 6: Final answer
    x = 23,788.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.