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Finding the Fourth Proportional to 18,422.31, 25,422.81 and 10,038.81

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Solution

The fourth proportional to 18,422.31, 25,422.81 and 10,038.81 is: 13,853.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422.31 : 25,422.81 = 10,038.81 : x
  2. Step 2: Convert to fraction form
    18,422.31/25,422.81 = 10,038.81/x
  3. Step 3: Cross multiply
    18,422.31x = 25,422.81 × 10,038.81
  4. Step 4: Simplify right side
    18,422.31x = 255,214,759.26
  5. Step 5: Solve for x
    x = 255,214,759.26/18,422.31
  6. Step 6: Final answer
    x = 13,853.57

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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.