Home / 20,643.12-28,487.28-11,690.60

Finding the Fourth Proportional to 20,643.12, 28,487.28 and 11,690.60

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Solution

The fourth proportional to 20,643.12, 28,487.28 and 11,690.60 is: 16,132.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.12 : 28,487.28 = 11,690.60 : x
  2. Step 2: Convert to fraction form
    20,643.12/28,487.28 = 11,690.60/x
  3. Step 3: Cross multiply
    20,643.12x = 28,487.28 × 11,690.60
  4. Step 4: Simplify right side
    20,643.12x = 333,033,395.57
  5. Step 5: Solve for x
    x = 333,033,395.57/20,643.12
  6. Step 6: Final answer
    x = 16,132.90

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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.