Home / 15,371.42-21,212.62-8,657.06

Finding the Fourth Proportional to 15,371.42, 21,212.62 and 8,657.06

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Solution

The fourth proportional to 15,371.42, 21,212.62 and 8,657.06 is: 11,946.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,371.42 : 21,212.62 = 8,657.06 : x
  2. Step 2: Convert to fraction form
    15,371.42/21,212.62 = 8,657.06/x
  3. Step 3: Cross multiply
    15,371.42x = 21,212.62 × 8,657.06
  4. Step 4: Simplify right side
    15,371.42x = 183,638,924.10
  5. Step 5: Solve for x
    x = 183,638,924.10/15,371.42
  6. Step 6: Final answer
    x = 11,946.78

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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.