Home / 20,606.40-28,438.03-11,531.69

Finding the Fourth Proportional to 20,606.40, 28,438.03 and 11,531.69

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Solution

The fourth proportional to 20,606.40, 28,438.03 and 11,531.69 is: 15,914.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,606.40 : 28,438.03 = 11,531.69 : x
  2. Step 2: Convert to fraction form
    20,606.40/28,438.03 = 11,531.69/x
  3. Step 3: Cross multiply
    20,606.40x = 28,438.03 × 11,531.69
  4. Step 4: Simplify right side
    20,606.40x = 327,938,504.15
  5. Step 5: Solve for x
    x = 327,938,504.15/20,606.40
  6. Step 6: Final answer
    x = 15,914.40

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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.