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Finding the Fourth Proportional to 84,647.66, 126,970.08 and 20,606.48

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Solution

The fourth proportional to 84,647.66, 126,970.08 and 20,606.48 is: 30,909.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,647.66 : 126,970.08 = 20,606.48 : x
  2. Step 2: Convert to fraction form
    84,647.66/126,970.08 = 20,606.48/x
  3. Step 3: Cross multiply
    84,647.66x = 126,970.08 × 20,606.48
  4. Step 4: Simplify right side
    84,647.66x = 2,616,406,414.12
  5. Step 5: Solve for x
    x = 2,616,406,414.12/84,647.66
  6. Step 6: Final answer
    x = 30,909.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.