Home / 20,187.51-27,890.37-15,424.13

Finding the Fourth Proportional to 20,187.51, 27,890.37 and 15,424.13

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Solution

The fourth proportional to 20,187.51, 27,890.37 and 15,424.13 is: 21,309.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.51 : 27,890.37 = 15,424.13 : x
  2. Step 2: Convert to fraction form
    20,187.51/27,890.37 = 15,424.13/x
  3. Step 3: Cross multiply
    20,187.51x = 27,890.37 × 15,424.13
  4. Step 4: Simplify right side
    20,187.51x = 430,184,553.18
  5. Step 5: Solve for x
    x = 430,184,553.18/20,187.51
  6. Step 6: Final answer
    x = 21,309.44

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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.