Home / 21,111.96-31,663.26-9,417.72

Finding the Fourth Proportional to 21,111.96, 31,663.26 and 9,417.72

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Solution

The fourth proportional to 21,111.96, 31,663.26 and 9,417.72 is: 14,124.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.96 : 31,663.26 = 9,417.72 : x
  2. Step 2: Convert to fraction form
    21,111.96/31,663.26 = 9,417.72/x
  3. Step 3: Cross multiply
    21,111.96x = 31,663.26 × 9,417.72
  4. Step 4: Simplify right side
    21,111.96x = 298,195,716.97
  5. Step 5: Solve for x
    x = 298,195,716.97/21,111.96
  6. Step 6: Final answer
    x = 14,124.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.