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Finding the Fourth Proportional to 22,207.68, 30,646.80 and 12,775.68

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Solution

The fourth proportional to 22,207.68, 30,646.80 and 12,775.68 is: 17,630.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,207.68 : 30,646.80 = 12,775.68 : x
  2. Step 2: Convert to fraction form
    22,207.68/30,646.80 = 12,775.68/x
  3. Step 3: Cross multiply
    22,207.68x = 30,646.80 × 12,775.68
  4. Step 4: Simplify right side
    22,207.68x = 391,533,709.82
  5. Step 5: Solve for x
    x = 391,533,709.82/22,207.68
  6. Step 6: Final answer
    x = 17,630.55

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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.