Home / 21,211.27-31,816.60-7,168.30

Finding the Fourth Proportional to 21,211.27, 31,816.60 and 7,168.30

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Solution

The fourth proportional to 21,211.27, 31,816.60 and 7,168.30 is: 10,752.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.27 : 31,816.60 = 7,168.30 : x
  2. Step 2: Convert to fraction form
    21,211.27/31,816.60 = 7,168.30/x
  3. Step 3: Cross multiply
    21,211.27x = 31,816.60 × 7,168.30
  4. Step 4: Simplify right side
    21,211.27x = 228,070,836.32
  5. Step 5: Solve for x
    x = 228,070,836.32/21,211.27
  6. Step 6: Final answer
    x = 10,752.34

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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.