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Finding the Fourth Proportional to 12,712.15, 19,068.48 and 8,948.54

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Solution

The fourth proportional to 12,712.15, 19,068.48 and 8,948.54 is: 13,422.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,712.15 : 19,068.48 = 8,948.54 : x
  2. Step 2: Convert to fraction form
    12,712.15/19,068.48 = 8,948.54/x
  3. Step 3: Cross multiply
    12,712.15x = 19,068.48 × 8,948.54
  4. Step 4: Simplify right side
    12,712.15x = 170,635,056.02
  5. Step 5: Solve for x
    x = 170,635,056.02/12,712.15
  6. Step 6: Final answer
    x = 13,422.99

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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.