Home / 20,643.22-28,487.97-11,690.48

Finding the Fourth Proportional to 20,643.22, 28,487.97 and 11,690.48

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Solution

The fourth proportional to 20,643.22, 28,487.97 and 11,690.48 is: 16,133.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.22 : 28,487.97 = 11,690.48 : x
  2. Step 2: Convert to fraction form
    20,643.22/28,487.97 = 11,690.48/x
  3. Step 3: Cross multiply
    20,643.22x = 28,487.97 × 11,690.48
  4. Step 4: Simplify right side
    20,643.22x = 333,038,043.53
  5. Step 5: Solve for x
    x = 333,038,043.53/20,643.22
  6. Step 6: Final answer
    x = 16,133.05

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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.