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Finding the Fourth Proportional to 30,139.54, 45,211.48 and 7,952.66

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Solution

The fourth proportional to 30,139.54, 45,211.48 and 7,952.66 is: 11,929.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,139.54 : 45,211.48 = 7,952.66 : x
  2. Step 2: Convert to fraction form
    30,139.54/45,211.48 = 7,952.66/x
  3. Step 3: Cross multiply
    30,139.54x = 45,211.48 × 7,952.66
  4. Step 4: Simplify right side
    30,139.54x = 359,551,528.54
  5. Step 5: Solve for x
    x = 359,551,528.54/30,139.54
  6. Step 6: Final answer
    x = 11,929.56

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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.