Home / 20,716.68-28,590.24-15,603.18

Finding the Fourth Proportional to 20,716.68, 28,590.24 and 15,603.18

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Solution

The fourth proportional to 20,716.68, 28,590.24 and 15,603.18 is: 21,533.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.68 : 28,590.24 = 15,603.18 : x
  2. Step 2: Convert to fraction form
    20,716.68/28,590.24 = 15,603.18/x
  3. Step 3: Cross multiply
    20,716.68x = 28,590.24 × 15,603.18
  4. Step 4: Simplify right side
    20,716.68x = 446,098,660.96
  5. Step 5: Solve for x
    x = 446,098,660.96/20,716.68
  6. Step 6: Final answer
    x = 21,533.31

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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.