Home / 21,948.17-30,288.69-13,331.86

Finding the Fourth Proportional to 21,948.17, 30,288.69 and 13,331.86

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Solution

The fourth proportional to 21,948.17, 30,288.69 and 13,331.86 is: 18,398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,948.17 : 30,288.69 = 13,331.86 : x
  2. Step 2: Convert to fraction form
    21,948.17/30,288.69 = 13,331.86/x
  3. Step 3: Cross multiply
    21,948.17x = 30,288.69 × 13,331.86
  4. Step 4: Simplify right side
    21,948.17x = 403,804,498.94
  5. Step 5: Solve for x
    x = 403,804,498.94/21,948.17
  6. Step 6: Final answer
    x = 18,398.10

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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.