Home / 21,910.10-32,867.55-21,218.90

Finding the Fourth Proportional to 21,910.10, 32,867.55 and 21,218.90

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Solution

The fourth proportional to 21,910.10, 32,867.55 and 21,218.90 is: 31,830.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,910.10 : 32,867.55 = 21,218.90 : x
  2. Step 2: Convert to fraction form
    21,910.10/32,867.55 = 21,218.90/x
  3. Step 3: Cross multiply
    21,910.10x = 32,867.55 × 21,218.90
  4. Step 4: Simplify right side
    21,910.10x = 697,413,256.70
  5. Step 5: Solve for x
    x = 697,413,256.70/21,910.10
  6. Step 6: Final answer
    x = 31,830.67

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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.