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Finding the Fourth Proportional to 31,990.70, 47,986.05 and 16,438.70

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Solution

The fourth proportional to 31,990.70, 47,986.05 and 16,438.70 is: 24,658.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,990.70 : 47,986.05 = 16,438.70 : x
  2. Step 2: Convert to fraction form
    31,990.70/47,986.05 = 16,438.70/x
  3. Step 3: Cross multiply
    31,990.70x = 47,986.05 × 16,438.70
  4. Step 4: Simplify right side
    31,990.70x = 788,828,280.14
  5. Step 5: Solve for x
    x = 788,828,280.14/31,990.70
  6. Step 6: Final answer
    x = 24,658.05

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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.