Home / 21,157.79-29,188.33-13,602.71

Finding the Fourth Proportional to 21,157.79, 29,188.33 and 13,602.71

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Solution

The fourth proportional to 21,157.79, 29,188.33 and 13,602.71 is: 18,765.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.79 : 29,188.33 = 13,602.71 : x
  2. Step 2: Convert to fraction form
    21,157.79/29,188.33 = 13,602.71/x
  3. Step 3: Cross multiply
    21,157.79x = 29,188.33 × 13,602.71
  4. Step 4: Simplify right side
    21,157.79x = 397,040,427.34
  5. Step 5: Solve for x
    x = 397,040,427.34/21,157.79
  6. Step 6: Final answer
    x = 18,765.69

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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.