Home / 13,685.49-18,885.69-7,717.14

Finding the Fourth Proportional to 13,685.49, 18,885.69 and 7,717.14

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Solution

The fourth proportional to 13,685.49, 18,885.69 and 7,717.14 is: 10,649.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.49 : 18,885.69 = 7,717.14 : x
  2. Step 2: Convert to fraction form
    13,685.49/18,885.69 = 7,717.14/x
  3. Step 3: Cross multiply
    13,685.49x = 18,885.69 × 7,717.14
  4. Step 4: Simplify right side
    13,685.49x = 145,743,513.73
  5. Step 5: Solve for x
    x = 145,743,513.73/13,685.49
  6. Step 6: Final answer
    x = 10,649.49

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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.