Home / 20,751.75-28,637.50-11,320.51

Finding the Fourth Proportional to 20,751.75, 28,637.50 and 11,320.51

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Solution

The fourth proportional to 20,751.75, 28,637.50 and 11,320.51 is: 15,622.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.75 : 28,637.50 = 11,320.51 : x
  2. Step 2: Convert to fraction form
    20,751.75/28,637.50 = 11,320.51/x
  3. Step 3: Cross multiply
    20,751.75x = 28,637.50 × 11,320.51
  4. Step 4: Simplify right side
    20,751.75x = 324,191,105.13
  5. Step 5: Solve for x
    x = 324,191,105.13/20,751.75
  6. Step 6: Final answer
    x = 15,622.35

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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.