Home / 13,915.21-20,875.55-5,150.20

Finding the Fourth Proportional to 13,915.21, 20,875.55 and 5,150.20

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Solution

The fourth proportional to 13,915.21, 20,875.55 and 5,150.20 is: 7,726.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.21 : 20,875.55 = 5,150.20 : x
  2. Step 2: Convert to fraction form
    13,915.21/20,875.55 = 5,150.20/x
  3. Step 3: Cross multiply
    13,915.21x = 20,875.55 × 5,150.20
  4. Step 4: Simplify right side
    13,915.21x = 107,513,179.67
  5. Step 5: Solve for x
    x = 107,513,179.67/13,915.21
  6. Step 6: Final answer
    x = 7,726.31

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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.