Home / 15,343.30-21,172.04-8,628.79

Finding the Fourth Proportional to 15,343.30, 21,172.04 and 8,628.79

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Solution

The fourth proportional to 15,343.30, 21,172.04 and 8,628.79 is: 11,906.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,343.30 : 21,172.04 = 8,628.79 : x
  2. Step 2: Convert to fraction form
    15,343.30/21,172.04 = 8,628.79/x
  3. Step 3: Cross multiply
    15,343.30x = 21,172.04 × 8,628.79
  4. Step 4: Simplify right side
    15,343.30x = 182,689,031.86
  5. Step 5: Solve for x
    x = 182,689,031.86/15,343.30
  6. Step 6: Final answer
    x = 11,906.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.