Home / 20,934.73-31,387.80-6,889.60

Finding the Fourth Proportional to 20,934.73, 31,387.80 and 6,889.60

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Solution

The fourth proportional to 20,934.73, 31,387.80 and 6,889.60 is: 10,329.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.73 : 31,387.80 = 6,889.60 : x
  2. Step 2: Convert to fraction form
    20,934.73/31,387.80 = 6,889.60/x
  3. Step 3: Cross multiply
    20,934.73x = 31,387.80 × 6,889.60
  4. Step 4: Simplify right side
    20,934.73x = 216,249,386.88
  5. Step 5: Solve for x
    x = 216,249,386.88/20,934.73
  6. Step 6: Final answer
    x = 10,329.70

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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.