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Finding the Fourth Proportional to 31,420.80, 47,131.80 and 25,151.70

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Solution

The fourth proportional to 31,420.80, 47,131.80 and 25,151.70 is: 37,728.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420.80 : 47,131.80 = 25,151.70 : x
  2. Step 2: Convert to fraction form
    31,420.80/47,131.80 = 25,151.70/x
  3. Step 3: Cross multiply
    31,420.80x = 47,131.80 × 25,151.70
  4. Step 4: Simplify right side
    31,420.80x = 1,185,444,894.06
  5. Step 5: Solve for x
    x = 1,185,444,894.06/31,420.80
  6. Step 6: Final answer
    x = 37,728.03

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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.