Home / 21,356.70-31,998.60-13,556.40

Finding the Fourth Proportional to 21,356.70, 31,998.60 and 13,556.40

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Solution

The fourth proportional to 21,356.70, 31,998.60 and 13,556.40 is: 20,311.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.70 : 31,998.60 = 13,556.40 : x
  2. Step 2: Convert to fraction form
    21,356.70/31,998.60 = 13,556.40/x
  3. Step 3: Cross multiply
    21,356.70x = 31,998.60 × 13,556.40
  4. Step 4: Simplify right side
    21,356.70x = 433,785,821.04
  5. Step 5: Solve for x
    x = 433,785,821.04/21,356.70
  6. Step 6: Final answer
    x = 20,311.46

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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.