Home / 21,358.09-29,471.99-12,407.49

Finding the Fourth Proportional to 21,358.09, 29,471.99 and 12,407.49

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Solution

The fourth proportional to 21,358.09, 29,471.99 and 12,407.49 is: 17,121.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,358.09 : 29,471.99 = 12,407.49 : x
  2. Step 2: Convert to fraction form
    21,358.09/29,471.99 = 12,407.49/x
  3. Step 3: Cross multiply
    21,358.09x = 29,471.99 × 12,407.49
  4. Step 4: Simplify right side
    21,358.09x = 365,673,359.17
  5. Step 5: Solve for x
    x = 365,673,359.17/21,358.09
  6. Step 6: Final answer
    x = 17,121.07

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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.