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Finding the Fourth Proportional to 12,599.91, 17,380.67 and 7,875.99

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Solution

The fourth proportional to 12,599.91, 17,380.67 and 7,875.99 is: 10,864.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,599.91 : 17,380.67 = 7,875.99 : x
  2. Step 2: Convert to fraction form
    12,599.91/17,380.67 = 7,875.99/x
  3. Step 3: Cross multiply
    12,599.91x = 17,380.67 × 7,875.99
  4. Step 4: Simplify right side
    12,599.91x = 136,889,994.72
  5. Step 5: Solve for x
    x = 136,889,994.72/12,599.91
  6. Step 6: Final answer
    x = 10,864.36

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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.