Home / 20,643.21-28,488.30-11,690.52

Finding the Fourth Proportional to 20,643.21, 28,488.30 and 11,690.52

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Solution

The fourth proportional to 20,643.21, 28,488.30 and 11,690.52 is: 16,133.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.21 : 28,488.30 = 11,690.52 : x
  2. Step 2: Convert to fraction form
    20,643.21/28,488.30 = 11,690.52/x
  3. Step 3: Cross multiply
    20,643.21x = 28,488.30 × 11,690.52
  4. Step 4: Simplify right side
    20,643.21x = 333,043,040.92
  5. Step 5: Solve for x
    x = 333,043,040.92/20,643.21
  6. Step 6: Final answer
    x = 16,133.30

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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.