Home / 20,846.16-28,772.16-13,290.75

Finding the Fourth Proportional to 20,846.16, 28,772.16 and 13,290.75

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Solution

The fourth proportional to 20,846.16, 28,772.16 and 13,290.75 is: 18,344.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.16 : 28,772.16 = 13,290.75 : x
  2. Step 2: Convert to fraction form
    20,846.16/28,772.16 = 13,290.75/x
  3. Step 3: Cross multiply
    20,846.16x = 28,772.16 × 13,290.75
  4. Step 4: Simplify right side
    20,846.16x = 382,403,585.52
  5. Step 5: Solve for x
    x = 382,403,585.52/20,846.16
  6. Step 6: Final answer
    x = 18,344.08

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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.