Home / 12,705.75-17,530.14-8,222.40

Finding the Fourth Proportional to 12,705.75, 17,530.14 and 8,222.40

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Solution

The fourth proportional to 12,705.75, 17,530.14 and 8,222.40 is: 11,344.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,705.75 : 17,530.14 = 8,222.40 : x
  2. Step 2: Convert to fraction form
    12,705.75/17,530.14 = 8,222.40/x
  3. Step 3: Cross multiply
    12,705.75x = 17,530.14 × 8,222.40
  4. Step 4: Simplify right side
    12,705.75x = 144,139,823.14
  5. Step 5: Solve for x
    x = 144,139,823.14/12,705.75
  6. Step 6: Final answer
    x = 11,344.46

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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.