Home / 21,216.63-29,262.06-13,663.59

Finding the Fourth Proportional to 21,216.63, 29,262.06 and 13,663.59

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Solution

The fourth proportional to 21,216.63, 29,262.06 and 13,663.59 is: 18,844.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.63 : 29,262.06 = 13,663.59 : x
  2. Step 2: Convert to fraction form
    21,216.63/29,262.06 = 13,663.59/x
  3. Step 3: Cross multiply
    21,216.63x = 29,262.06 × 13,663.59
  4. Step 4: Simplify right side
    21,216.63x = 399,824,680.66
  5. Step 5: Solve for x
    x = 399,824,680.66/21,216.63
  6. Step 6: Final answer
    x = 18,844.87

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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.