Home / 15,621.29-21,578.06-13,628.39

Finding the Fourth Proportional to 15,621.29, 21,578.06 and 13,628.39

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Solution

The fourth proportional to 15,621.29, 21,578.06 and 13,628.39 is: 18,825.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.29 : 21,578.06 = 13,628.39 : x
  2. Step 2: Convert to fraction form
    15,621.29/21,578.06 = 13,628.39/x
  3. Step 3: Cross multiply
    15,621.29x = 21,578.06 × 13,628.39
  4. Step 4: Simplify right side
    15,621.29x = 294,074,143.30
  5. Step 5: Solve for x
    x = 294,074,143.30/15,621.29
  6. Step 6: Final answer
    x = 18,825.22

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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.