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Finding the Fourth Proportional to 18,422, 25,422.40 and 10,038.48

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Solution

The fourth proportional to 18,422, 25,422.40 and 10,038.48 is: 13,853.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422 : 25,422.40 = 10,038.48 : x
  2. Step 2: Convert to fraction form
    18,422/25,422.40 = 10,038.48/x
  3. Step 3: Cross multiply
    18,422x = 25,422.40 × 10,038.48
  4. Step 4: Simplify right side
    18,422x = 255,202,253.95
  5. Step 5: Solve for x
    x = 255,202,253.95/18,422
  6. Step 6: Final answer
    x = 13,853.12

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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.