Home / 20,751.82-28,637.45-11,320.31

Finding the Fourth Proportional to 20,751.82, 28,637.45 and 11,320.31

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Solution

The fourth proportional to 20,751.82, 28,637.45 and 11,320.31 is: 15,622.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.82 : 28,637.45 = 11,320.31 : x
  2. Step 2: Convert to fraction form
    20,751.82/28,637.45 = 11,320.31/x
  3. Step 3: Cross multiply
    20,751.82x = 28,637.45 × 11,320.31
  4. Step 4: Simplify right side
    20,751.82x = 324,184,869.05
  5. Step 5: Solve for x
    x = 324,184,869.05/20,751.82
  6. Step 6: Final answer
    x = 15,622.00

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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.