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Finding the Fourth Proportional to 18,403.58, 25,404.57 and 13,928.58

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Solution

The fourth proportional to 18,403.58, 25,404.57 and 13,928.58 is: 19,227.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.58 : 25,404.57 = 13,928.58 : x
  2. Step 2: Convert to fraction form
    18,403.58/25,404.57 = 13,928.58/x
  3. Step 3: Cross multiply
    18,403.58x = 25,404.57 × 13,928.58
  4. Step 4: Simplify right side
    18,403.58x = 353,849,585.61
  5. Step 5: Solve for x
    x = 353,849,585.61/18,403.58
  6. Step 6: Final answer
    x = 19,227.21

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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.