Home / 21,575.40-29,749.32-13,908.48

Finding the Fourth Proportional to 21,575.40, 29,749.32 and 13,908.48

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Solution

The fourth proportional to 21,575.40, 29,749.32 and 13,908.48 is: 19,177.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,575.40 : 29,749.32 = 13,908.48 : x
  2. Step 2: Convert to fraction form
    21,575.40/29,749.32 = 13,908.48/x
  3. Step 3: Cross multiply
    21,575.40x = 29,749.32 × 13,908.48
  4. Step 4: Simplify right side
    21,575.40x = 413,767,822.23
  5. Step 5: Solve for x
    x = 413,767,822.23/21,575.40
  6. Step 6: Final answer
    x = 19,177.76

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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.