Home / 20,684.10-30,987.25-10,270.74

Finding the Fourth Proportional to 20,684.10, 30,987.25 and 10,270.74

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Solution

The fourth proportional to 20,684.10, 30,987.25 and 10,270.74 is: 15,386.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,684.10 : 30,987.25 = 10,270.74 : x
  2. Step 2: Convert to fraction form
    20,684.10/30,987.25 = 10,270.74/x
  3. Step 3: Cross multiply
    20,684.10x = 30,987.25 × 10,270.74
  4. Step 4: Simplify right side
    20,684.10x = 318,261,988.07
  5. Step 5: Solve for x
    x = 318,261,988.07/20,684.10
  6. Step 6: Final answer
    x = 15,386.79

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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.