Home / 20,931.52-31,393.82-6,891.74

Finding the Fourth Proportional to 20,931.52, 31,393.82 and 6,891.74

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Solution

The fourth proportional to 20,931.52, 31,393.82 and 6,891.74 is: 10,336.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.52 : 31,393.82 = 6,891.74 : x
  2. Step 2: Convert to fraction form
    20,931.52/31,393.82 = 6,891.74/x
  3. Step 3: Cross multiply
    20,931.52x = 31,393.82 × 6,891.74
  4. Step 4: Simplify right side
    20,931.52x = 216,358,045.05
  5. Step 5: Solve for x
    x = 216,358,045.05/20,931.52
  6. Step 6: Final answer
    x = 10,336.47

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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.