Home / 20,897.70-31,350.66-9,211.02

Finding the Fourth Proportional to 20,897.70, 31,350.66 and 9,211.02

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Solution

The fourth proportional to 20,897.70, 31,350.66 and 9,211.02 is: 13,818.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.70 : 31,350.66 = 9,211.02 : x
  2. Step 2: Convert to fraction form
    20,897.70/31,350.66 = 9,211.02/x
  3. Step 3: Cross multiply
    20,897.70x = 31,350.66 × 9,211.02
  4. Step 4: Simplify right side
    20,897.70x = 288,771,556.27
  5. Step 5: Solve for x
    x = 288,771,556.27/20,897.70
  6. Step 6: Final answer
    x = 13,818.34

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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.