Home / 21,172.73-29,236.95-13,228.52

Finding the Fourth Proportional to 21,172.73, 29,236.95 and 13,228.52

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Solution

The fourth proportional to 21,172.73, 29,236.95 and 13,228.52 is: 18,266.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.73 : 29,236.95 = 13,228.52 : x
  2. Step 2: Convert to fraction form
    21,172.73/29,236.95 = 13,228.52/x
  3. Step 3: Cross multiply
    21,172.73x = 29,236.95 × 13,228.52
  4. Step 4: Simplify right side
    21,172.73x = 386,761,431.63
  5. Step 5: Solve for x
    x = 386,761,431.63/21,172.73
  6. Step 6: Final answer
    x = 18,266.97

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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.