Home / 21,097.70-31,630.94-12,775.76

Finding the Fourth Proportional to 21,097.70, 31,630.94 and 12,775.76

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Solution

The fourth proportional to 21,097.70, 31,630.94 and 12,775.76 is: 19,154.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,097.70 : 31,630.94 = 12,775.76 : x
  2. Step 2: Convert to fraction form
    21,097.70/31,630.94 = 12,775.76/x
  3. Step 3: Cross multiply
    21,097.70x = 31,630.94 × 12,775.76
  4. Step 4: Simplify right side
    21,097.70x = 404,109,298.01
  5. Step 5: Solve for x
    x = 404,109,298.01/21,097.70
  6. Step 6: Final answer
    x = 19,154.19

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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.