Home / 21,212.70-31,775.85-10,830.30

Finding the Fourth Proportional to 21,212.70, 31,775.85 and 10,830.30

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Solution

The fourth proportional to 21,212.70, 31,775.85 and 10,830.30 is: 16,223.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.70 : 31,775.85 = 10,830.30 : x
  2. Step 2: Convert to fraction form
    21,212.70/31,775.85 = 10,830.30/x
  3. Step 3: Cross multiply
    21,212.70x = 31,775.85 × 10,830.30
  4. Step 4: Simplify right side
    21,212.70x = 344,141,988.26
  5. Step 5: Solve for x
    x = 344,141,988.26/21,212.70
  6. Step 6: Final answer
    x = 16,223.39

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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.