Home / 21,471.36-29,631.06-12,039.72

Finding the Fourth Proportional to 21,471.36, 29,631.06 and 12,039.72

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Solution

The fourth proportional to 21,471.36, 29,631.06 and 12,039.72 is: 16,615.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,471.36 : 29,631.06 = 12,039.72 : x
  2. Step 2: Convert to fraction form
    21,471.36/29,631.06 = 12,039.72/x
  3. Step 3: Cross multiply
    21,471.36x = 29,631.06 × 12,039.72
  4. Step 4: Simplify right side
    21,471.36x = 356,749,665.70
  5. Step 5: Solve for x
    x = 356,749,665.70/21,471.36
  6. Step 6: Final answer
    x = 16,615.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.