Home / 21,663.77-29,902.58-13,708.56

Finding the Fourth Proportional to 21,663.77, 29,902.58 and 13,708.56

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Solution

The fourth proportional to 21,663.77, 29,902.58 and 13,708.56 is: 18,921.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.77 : 29,902.58 = 13,708.56 : x
  2. Step 2: Convert to fraction form
    21,663.77/29,902.58 = 13,708.56/x
  3. Step 3: Cross multiply
    21,663.77x = 29,902.58 × 13,708.56
  4. Step 4: Simplify right side
    21,663.77x = 409,921,243.54
  5. Step 5: Solve for x
    x = 409,921,243.54/21,663.77
  6. Step 6: Final answer
    x = 18,921.98

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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.