Home / 21,085.92-31,635.36-7,236

Finding the Fourth Proportional to 21,085.92, 31,635.36 and 7,236

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Solution

The fourth proportional to 21,085.92, 31,635.36 and 7,236 is: 10,856.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.92 : 31,635.36 = 7,236 : x
  2. Step 2: Convert to fraction form
    21,085.92/31,635.36 = 7,236/x
  3. Step 3: Cross multiply
    21,085.92x = 31,635.36 × 7,236
  4. Step 4: Simplify right side
    21,085.92x = 228,913,464.96
  5. Step 5: Solve for x
    x = 228,913,464.96/21,085.92
  6. Step 6: Final answer
    x = 10,856.22

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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.