Home / 20,928.16-28,880.73-12,544.66

Finding the Fourth Proportional to 20,928.16, 28,880.73 and 12,544.66

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Solution

The fourth proportional to 20,928.16, 28,880.73 and 12,544.66 is: 17,311.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.16 : 28,880.73 = 12,544.66 : x
  2. Step 2: Convert to fraction form
    20,928.16/28,880.73 = 12,544.66/x
  3. Step 3: Cross multiply
    20,928.16x = 28,880.73 × 12,544.66
  4. Step 4: Simplify right side
    20,928.16x = 362,298,938.40
  5. Step 5: Solve for x
    x = 362,298,938.40/20,928.16
  6. Step 6: Final answer
    x = 17,311.55

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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.