Home / 12,812.77-17,681.65-7,147.38

Finding the Fourth Proportional to 12,812.77, 17,681.65 and 7,147.38

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Solution

The fourth proportional to 12,812.77, 17,681.65 and 7,147.38 is: 9,863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.77 : 17,681.65 = 7,147.38 : x
  2. Step 2: Convert to fraction form
    12,812.77/17,681.65 = 7,147.38/x
  3. Step 3: Cross multiply
    12,812.77x = 17,681.65 × 7,147.38
  4. Step 4: Simplify right side
    12,812.77x = 126,377,460.76
  5. Step 5: Solve for x
    x = 126,377,460.76/12,812.77
  6. Step 6: Final answer
    x = 9,863.40

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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.