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Finding the Fourth Proportional to 12,685.60, 19,035.60 and 4,894.88

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Solution

The fourth proportional to 12,685.60, 19,035.60 and 4,894.88 is: 7,345.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.60 : 19,035.60 = 4,894.88 : x
  2. Step 2: Convert to fraction form
    12,685.60/19,035.60 = 4,894.88/x
  3. Step 3: Cross multiply
    12,685.60x = 19,035.60 × 4,894.88
  4. Step 4: Simplify right side
    12,685.60x = 93,176,977.73
  5. Step 5: Solve for x
    x = 93,176,977.73/12,685.60
  6. Step 6: Final answer
    x = 7,345.10

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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.