Home / 13,875.25-20,832.21-7,125.57

Finding the Fourth Proportional to 13,875.25, 20,832.21 and 7,125.57

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Solution

The fourth proportional to 13,875.25, 20,832.21 and 7,125.57 is: 10,698.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,875.25 : 20,832.21 = 7,125.57 : x
  2. Step 2: Convert to fraction form
    13,875.25/20,832.21 = 7,125.57/x
  3. Step 3: Cross multiply
    13,875.25x = 20,832.21 × 7,125.57
  4. Step 4: Simplify right side
    13,875.25x = 148,441,370.61
  5. Step 5: Solve for x
    x = 148,441,370.61/13,875.25
  6. Step 6: Final answer
    x = 10,698.28

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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.