Home / 21,378.24-29,504.16-13,426.56

Finding the Fourth Proportional to 21,378.24, 29,504.16 and 13,426.56

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Solution

The fourth proportional to 21,378.24, 29,504.16 and 13,426.56 is: 18,530.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.24 : 29,504.16 = 13,426.56 : x
  2. Step 2: Convert to fraction form
    21,378.24/29,504.16 = 13,426.56/x
  3. Step 3: Cross multiply
    21,378.24x = 29,504.16 × 13,426.56
  4. Step 4: Simplify right side
    21,378.24x = 396,139,374.49
  5. Step 5: Solve for x
    x = 396,139,374.49/21,378.24
  6. Step 6: Final answer
    x = 18,530.03

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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.