Home / 15,614.40-21,531.76-13,383.68

Finding the Fourth Proportional to 15,614.40, 21,531.76 and 13,383.68

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Solution

The fourth proportional to 15,614.40, 21,531.76 and 13,383.68 is: 18,455.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,614.40 : 21,531.76 = 13,383.68 : x
  2. Step 2: Convert to fraction form
    15,614.40/21,531.76 = 13,383.68/x
  3. Step 3: Cross multiply
    15,614.40x = 21,531.76 × 13,383.68
  4. Step 4: Simplify right side
    15,614.40x = 288,174,185.68
  5. Step 5: Solve for x
    x = 288,174,185.68/15,614.40
  6. Step 6: Final answer
    x = 18,455.67

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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.