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Finding the Fourth Proportional to 18,904.61, 28,374.41 and 9,551.21

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Solution

The fourth proportional to 18,904.61, 28,374.41 and 9,551.21 is: 14,335.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.61 : 28,374.41 = 9,551.21 : x
  2. Step 2: Convert to fraction form
    18,904.61/28,374.41 = 9,551.21/x
  3. Step 3: Cross multiply
    18,904.61x = 28,374.41 × 9,551.21
  4. Step 4: Simplify right side
    18,904.61x = 271,009,830.54
  5. Step 5: Solve for x
    x = 271,009,830.54/18,904.61
  6. Step 6: Final answer
    x = 14,335.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.