Home / 21,037.48-31,602.02-12,721.41

Finding the Fourth Proportional to 21,037.48, 31,602.02 and 12,721.41

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Solution

The fourth proportional to 21,037.48, 31,602.02 and 12,721.41 is: 19,109.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,037.48 : 31,602.02 = 12,721.41 : x
  2. Step 2: Convert to fraction form
    21,037.48/31,602.02 = 12,721.41/x
  3. Step 3: Cross multiply
    21,037.48x = 31,602.02 × 12,721.41
  4. Step 4: Simplify right side
    21,037.48x = 402,022,189.64
  5. Step 5: Solve for x
    x = 402,022,189.64/21,037.48
  6. Step 6: Final answer
    x = 19,109.81

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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.