Home / 21,188.48-29,227.95-13,216.87

Finding the Fourth Proportional to 21,188.48, 29,227.95 and 13,216.87

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Solution

The fourth proportional to 21,188.48, 29,227.95 and 13,216.87 is: 18,231.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.48 : 29,227.95 = 13,216.87 : x
  2. Step 2: Convert to fraction form
    21,188.48/29,227.95 = 13,216.87/x
  3. Step 3: Cross multiply
    21,188.48x = 29,227.95 × 13,216.87
  4. Step 4: Simplify right side
    21,188.48x = 386,302,015.52
  5. Step 5: Solve for x
    x = 386,302,015.52/21,188.48
  6. Step 6: Final answer
    x = 18,231.70

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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.