Home / 19,645.96-27,121.10-15,389.68

Finding the Fourth Proportional to 19,645.96, 27,121.10 and 15,389.68

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Solution

The fourth proportional to 19,645.96, 27,121.10 and 15,389.68 is: 21,245.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,645.96 : 27,121.10 = 15,389.68 : x
  2. Step 2: Convert to fraction form
    19,645.96/27,121.10 = 15,389.68/x
  3. Step 3: Cross multiply
    19,645.96x = 27,121.10 × 15,389.68
  4. Step 4: Simplify right side
    19,645.96x = 417,385,050.25
  5. Step 5: Solve for x
    x = 417,385,050.25/19,645.96
  6. Step 6: Final answer
    x = 21,245.34

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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.