Home / 13,685.40-18,885.87-7,717.14

Finding the Fourth Proportional to 13,685.40, 18,885.87 and 7,717.14

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Solution

The fourth proportional to 13,685.40, 18,885.87 and 7,717.14 is: 10,649.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.40 : 18,885.87 = 7,717.14 : x
  2. Step 2: Convert to fraction form
    13,685.40/18,885.87 = 7,717.14/x
  3. Step 3: Cross multiply
    13,685.40x = 18,885.87 × 7,717.14
  4. Step 4: Simplify right side
    13,685.40x = 145,744,902.81
  5. Step 5: Solve for x
    x = 145,744,902.81/13,685.40
  6. Step 6: Final answer
    x = 10,649.66

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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.