Home / 13,685.90-20,531.07-5,256.23

Finding the Fourth Proportional to 13,685.90, 20,531.07 and 5,256.23

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Solution

The fourth proportional to 13,685.90, 20,531.07 and 5,256.23 is: 7,885.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.90 : 20,531.07 = 5,256.23 : x
  2. Step 2: Convert to fraction form
    13,685.90/20,531.07 = 5,256.23/x
  3. Step 3: Cross multiply
    13,685.90x = 20,531.07 × 5,256.23
  4. Step 4: Simplify right side
    13,685.90x = 107,915,923.41
  5. Step 5: Solve for x
    x = 107,915,923.41/13,685.90
  6. Step 6: Final answer
    x = 7,885.19

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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.