Home / 21,513.28-29,690.43-12,439.03

Finding the Fourth Proportional to 21,513.28, 29,690.43 and 12,439.03

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Solution

The fourth proportional to 21,513.28, 29,690.43 and 12,439.03 is: 17,167.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.28 : 29,690.43 = 12,439.03 : x
  2. Step 2: Convert to fraction form
    21,513.28/29,690.43 = 12,439.03/x
  3. Step 3: Cross multiply
    21,513.28x = 29,690.43 × 12,439.03
  4. Step 4: Simplify right side
    21,513.28x = 369,320,149.48
  5. Step 5: Solve for x
    x = 369,320,149.48/21,513.28
  6. Step 6: Final answer
    x = 17,167.08

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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.