Home / 21,274.80-31,913.40-6,484.20

Finding the Fourth Proportional to 21,274.80, 31,913.40 and 6,484.20

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Solution

The fourth proportional to 21,274.80, 31,913.40 and 6,484.20 is: 9,726.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.80 : 31,913.40 = 6,484.20 : x
  2. Step 2: Convert to fraction form
    21,274.80/31,913.40 = 6,484.20/x
  3. Step 3: Cross multiply
    21,274.80x = 31,913.40 × 6,484.20
  4. Step 4: Simplify right side
    21,274.80x = 206,932,868.28
  5. Step 5: Solve for x
    x = 206,932,868.28/21,274.80
  6. Step 6: Final answer
    x = 9,726.67

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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.