Home / 18,921-26,110.74-10,422.90

Finding the Fourth Proportional to 18,921, 26,110.74 and 10,422.90

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Solution

The fourth proportional to 18,921, 26,110.74 and 10,422.90 is: 14,383.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921 : 26,110.74 = 10,422.90 : x
  2. Step 2: Convert to fraction form
    18,921/26,110.74 = 10,422.90/x
  3. Step 3: Cross multiply
    18,921x = 26,110.74 × 10,422.90
  4. Step 4: Simplify right side
    18,921x = 272,149,631.95
  5. Step 5: Solve for x
    x = 272,149,631.95/18,921
  6. Step 6: Final answer
    x = 14,383.47

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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.