Home / 21,298.82-31,946.81-8,815.64

Finding the Fourth Proportional to 21,298.82, 31,946.81 and 8,815.64

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Solution

The fourth proportional to 21,298.82, 31,946.81 and 8,815.64 is: 13,222.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298.82 : 31,946.81 = 8,815.64 : x
  2. Step 2: Convert to fraction form
    21,298.82/31,946.81 = 8,815.64/x
  3. Step 3: Cross multiply
    21,298.82x = 31,946.81 × 8,815.64
  4. Step 4: Simplify right side
    21,298.82x = 281,631,372.30
  5. Step 5: Solve for x
    x = 281,631,372.30/21,298.82
  6. Step 6: Final answer
    x = 13,222.87

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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.