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Finding the Fourth Proportional to 31,811.70, 47,705.40 and 9,617.70

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Solution

The fourth proportional to 31,811.70, 47,705.40 and 9,617.70 is: 14,422.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,811.70 : 47,705.40 = 9,617.70 : x
  2. Step 2: Convert to fraction form
    31,811.70/47,705.40 = 9,617.70/x
  3. Step 3: Cross multiply
    31,811.70x = 47,705.40 × 9,617.70
  4. Step 4: Simplify right side
    31,811.70x = 458,816,225.58
  5. Step 5: Solve for x
    x = 458,816,225.58/31,811.70
  6. Step 6: Final answer
    x = 14,422.88

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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.