Home / 12,781.14-17,636.40-7,114.47

Finding the Fourth Proportional to 12,781.14, 17,636.40 and 7,114.47

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Solution

The fourth proportional to 12,781.14, 17,636.40 and 7,114.47 is: 9,817.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,781.14 : 17,636.40 = 7,114.47 : x
  2. Step 2: Convert to fraction form
    12,781.14/17,636.40 = 7,114.47/x
  3. Step 3: Cross multiply
    12,781.14x = 17,636.40 × 7,114.47
  4. Step 4: Simplify right side
    12,781.14x = 125,473,638.71
  5. Step 5: Solve for x
    x = 125,473,638.71/12,781.14
  6. Step 6: Final answer
    x = 9,817.09

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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.