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Finding the Fourth Proportional to 31,959.95, 47,949.03 and 12,990.47

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Solution

The fourth proportional to 31,959.95, 47,949.03 and 12,990.47 is: 19,489.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,959.95 : 47,949.03 = 12,990.47 : x
  2. Step 2: Convert to fraction form
    31,959.95/47,949.03 = 12,990.47/x
  3. Step 3: Cross multiply
    31,959.95x = 47,949.03 × 12,990.47
  4. Step 4: Simplify right side
    31,959.95x = 622,880,196.00
  5. Step 5: Solve for x
    x = 622,880,196.00/31,959.95
  6. Step 6: Final answer
    x = 19,489.40

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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.