Home / 12,688.84-17,513.88-8,447.02

Finding the Fourth Proportional to 12,688.84, 17,513.88 and 8,447.02

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Solution

The fourth proportional to 12,688.84, 17,513.88 and 8,447.02 is: 11,659.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.84 : 17,513.88 = 8,447.02 : x
  2. Step 2: Convert to fraction form
    12,688.84/17,513.88 = 8,447.02/x
  3. Step 3: Cross multiply
    12,688.84x = 17,513.88 × 8,447.02
  4. Step 4: Simplify right side
    12,688.84x = 147,940,094.64
  5. Step 5: Solve for x
    x = 147,940,094.64/12,688.84
  6. Step 6: Final answer
    x = 11,659.07

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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.