Home / 20,645.28-28,485.54-11,690.82

Finding the Fourth Proportional to 20,645.28, 28,485.54 and 11,690.82

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Solution

The fourth proportional to 20,645.28, 28,485.54 and 11,690.82 is: 16,130.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.28 : 28,485.54 = 11,690.82 : x
  2. Step 2: Convert to fraction form
    20,645.28/28,485.54 = 11,690.82/x
  3. Step 3: Cross multiply
    20,645.28x = 28,485.54 × 11,690.82
  4. Step 4: Simplify right side
    20,645.28x = 333,019,320.74
  5. Step 5: Solve for x
    x = 333,019,320.74/20,645.28
  6. Step 6: Final answer
    x = 16,130.53

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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.