Home / 15,309.14-21,126.83-9,021.51

Finding the Fourth Proportional to 15,309.14, 21,126.83 and 9,021.51

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Solution

The fourth proportional to 15,309.14, 21,126.83 and 9,021.51 is: 12,449.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.14 : 21,126.83 = 9,021.51 : x
  2. Step 2: Convert to fraction form
    15,309.14/21,126.83 = 9,021.51/x
  3. Step 3: Cross multiply
    15,309.14x = 21,126.83 × 9,021.51
  4. Step 4: Simplify right side
    15,309.14x = 190,595,863.01
  5. Step 5: Solve for x
    x = 190,595,863.01/15,309.14
  6. Step 6: Final answer
    x = 12,449.81

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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.