Home / 20,643.45-28,488.34-11,690.92

Finding the Fourth Proportional to 20,643.45, 28,488.34 and 11,690.92

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Solution

The fourth proportional to 20,643.45, 28,488.34 and 11,690.92 is: 16,133.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.45 : 28,488.34 = 11,690.92 : x
  2. Step 2: Convert to fraction form
    20,643.45/28,488.34 = 11,690.92/x
  3. Step 3: Cross multiply
    20,643.45x = 28,488.34 × 11,690.92
  4. Step 4: Simplify right side
    20,643.45x = 333,054,903.87
  5. Step 5: Solve for x
    x = 333,054,903.87/20,643.45
  6. Step 6: Final answer
    x = 16,133.68

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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.