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Finding the Fourth Proportional to 22,307.90, 30,784.90 and 12,876.46

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Solution

The fourth proportional to 22,307.90, 30,784.90 and 12,876.46 is: 17,769.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,307.90 : 30,784.90 = 12,876.46 : x
  2. Step 2: Convert to fraction form
    22,307.90/30,784.90 = 12,876.46/x
  3. Step 3: Cross multiply
    22,307.90x = 30,784.90 × 12,876.46
  4. Step 4: Simplify right side
    22,307.90x = 396,400,565.65
  5. Step 5: Solve for x
    x = 396,400,565.65/22,307.90
  6. Step 6: Final answer
    x = 17,769.52

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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.