Home / 22,307.12-30,781.32-12,878.80

Finding the Fourth Proportional to 22,307.12, 30,781.32 and 12,878.80

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Solution

The fourth proportional to 22,307.12, 30,781.32 and 12,878.80 is: 17,771.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,307.12 : 30,781.32 = 12,878.80 : x
  2. Step 2: Convert to fraction form
    22,307.12/30,781.32 = 12,878.80/x
  3. Step 3: Cross multiply
    22,307.12x = 30,781.32 × 12,878.80
  4. Step 4: Simplify right side
    22,307.12x = 396,426,464.02
  5. Step 5: Solve for x
    x = 396,426,464.02/22,307.12
  6. Step 6: Final answer
    x = 17,771.30

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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.