Home / 31,711.20-43,627.32-30,836.40

Finding the Fourth Proportional to 31,711.20, 43,627.32 and 30,836.40

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Solution

The fourth proportional to 31,711.20, 43,627.32 and 30,836.40 is: 42,423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,711.20 : 43,627.32 = 30,836.40 : x
  2. Step 2: Convert to fraction form
    31,711.20/43,627.32 = 30,836.40/x
  3. Step 3: Cross multiply
    31,711.20x = 43,627.32 × 30,836.40
  4. Step 4: Simplify right side
    31,711.20x = 1,345,309,490.45
  5. Step 5: Solve for x
    x = 1,345,309,490.45/31,711.20
  6. Step 6: Final answer
    x = 42,423.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.