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Finding the Fourth Proportional to 30,139.54, 45,204.15 and 7,953.15

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Solution

The fourth proportional to 30,139.54, 45,204.15 and 7,953.15 is: 11,928.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,139.54 : 45,204.15 = 7,953.15 : x
  2. Step 2: Convert to fraction form
    30,139.54/45,204.15 = 7,953.15/x
  3. Step 3: Cross multiply
    30,139.54x = 45,204.15 × 7,953.15
  4. Step 4: Simplify right side
    30,139.54x = 359,515,385.57
  5. Step 5: Solve for x
    x = 359,515,385.57/30,139.54
  6. Step 6: Final answer
    x = 11,928.36

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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.