Home / 21,236.71-29,298.49-13,682.47

Finding the Fourth Proportional to 21,236.71, 29,298.49 and 13,682.47

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Solution

The fourth proportional to 21,236.71, 29,298.49 and 13,682.47 is: 18,876.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,236.71 : 29,298.49 = 13,682.47 : x
  2. Step 2: Convert to fraction form
    21,236.71/29,298.49 = 13,682.47/x
  3. Step 3: Cross multiply
    21,236.71x = 29,298.49 × 13,682.47
  4. Step 4: Simplify right side
    21,236.71x = 400,875,710.47
  5. Step 5: Solve for x
    x = 400,875,710.47/21,236.71
  6. Step 6: Final answer
    x = 18,876.54

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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.