Home / 13,581.36-18,742.31-7,915.68

Finding the Fourth Proportional to 13,581.36, 18,742.31 and 7,915.68

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Solution

The fourth proportional to 13,581.36, 18,742.31 and 7,915.68 is: 10,923.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.36 : 18,742.31 = 7,915.68 : x
  2. Step 2: Convert to fraction form
    13,581.36/18,742.31 = 7,915.68/x
  3. Step 3: Cross multiply
    13,581.36x = 18,742.31 × 7,915.68
  4. Step 4: Simplify right side
    13,581.36x = 148,358,128.42
  5. Step 5: Solve for x
    x = 148,358,128.42/13,581.36
  6. Step 6: Final answer
    x = 10,923.66

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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.