Home / 20,615.16-30,931.96-11,850.07

Finding the Fourth Proportional to 20,615.16, 30,931.96 and 11,850.07

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Solution

The fourth proportional to 20,615.16, 30,931.96 and 11,850.07 is: 17,780.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.16 : 30,931.96 = 11,850.07 : x
  2. Step 2: Convert to fraction form
    20,615.16/30,931.96 = 11,850.07/x
  3. Step 3: Cross multiply
    20,615.16x = 30,931.96 × 11,850.07
  4. Step 4: Simplify right side
    20,615.16x = 366,546,001.49
  5. Step 5: Solve for x
    x = 366,546,001.49/20,615.16
  6. Step 6: Final answer
    x = 17,780.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.