Home / 15,343.40-21,172.38-8,628.87

Finding the Fourth Proportional to 15,343.40, 21,172.38 and 8,628.87

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Solution

The fourth proportional to 15,343.40, 21,172.38 and 8,628.87 is: 11,906.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,343.40 : 21,172.38 = 8,628.87 : x
  2. Step 2: Convert to fraction form
    15,343.40/21,172.38 = 8,628.87/x
  3. Step 3: Cross multiply
    15,343.40x = 21,172.38 × 8,628.87
  4. Step 4: Simplify right side
    15,343.40x = 182,693,714.61
  5. Step 5: Solve for x
    x = 182,693,714.61/15,343.40
  6. Step 6: Final answer
    x = 11,906.99

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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.