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Finding the Fourth Proportional to 31,808.99, 47,715.15 and 9,621.80

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Solution

The fourth proportional to 31,808.99, 47,715.15 and 9,621.80 is: 14,433.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,808.99 : 47,715.15 = 9,621.80 : x
  2. Step 2: Convert to fraction form
    31,808.99/47,715.15 = 9,621.80/x
  3. Step 3: Cross multiply
    31,808.99x = 47,715.15 × 9,621.80
  4. Step 4: Simplify right side
    31,808.99x = 459,105,630.27
  5. Step 5: Solve for x
    x = 459,105,630.27/31,808.99
  6. Step 6: Final answer
    x = 14,433.20

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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.