Home / 21,265.09-29,343.92-12,313.20

Finding the Fourth Proportional to 21,265.09, 29,343.92 and 12,313.20

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Solution

The fourth proportional to 21,265.09, 29,343.92 and 12,313.20 is: 16,991.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.09 : 29,343.92 = 12,313.20 : x
  2. Step 2: Convert to fraction form
    21,265.09/29,343.92 = 12,313.20/x
  3. Step 3: Cross multiply
    21,265.09x = 29,343.92 × 12,313.20
  4. Step 4: Simplify right side
    21,265.09x = 361,317,494.18
  5. Step 5: Solve for x
    x = 361,317,494.18/21,265.09
  6. Step 6: Final answer
    x = 16,991.11

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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.