Home / 21,011.60-31,483.38-9,891.92

Finding the Fourth Proportional to 21,011.60, 31,483.38 and 9,891.92

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Solution

The fourth proportional to 21,011.60, 31,483.38 and 9,891.92 is: 14,821.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.60 : 31,483.38 = 9,891.92 : x
  2. Step 2: Convert to fraction form
    21,011.60/31,483.38 = 9,891.92/x
  3. Step 3: Cross multiply
    21,011.60x = 31,483.38 × 9,891.92
  4. Step 4: Simplify right side
    21,011.60x = 311,431,076.29
  5. Step 5: Solve for x
    x = 311,431,076.29/21,011.60
  6. Step 6: Final answer
    x = 14,821.86

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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.