Home / 31,364.40-47,008.20-13,815.60

Finding the Fourth Proportional to 31,364.40, 47,008.20 and 13,815.60

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Solution

The fourth proportional to 31,364.40, 47,008.20 and 13,815.60 is: 20,706.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,364.40 : 47,008.20 = 13,815.60 : x
  2. Step 2: Convert to fraction form
    31,364.40/47,008.20 = 13,815.60/x
  3. Step 3: Cross multiply
    31,364.40x = 47,008.20 × 13,815.60
  4. Step 4: Simplify right side
    31,364.40x = 649,446,487.92
  5. Step 5: Solve for x
    x = 649,446,487.92/31,364.40
  6. Step 6: Final answer
    x = 20,706.49

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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.