Home / 13,875.20-20,820.36-5,108.84

Finding the Fourth Proportional to 13,875.20, 20,820.36 and 5,108.84

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Solution

The fourth proportional to 13,875.20, 20,820.36 and 5,108.84 is: 7,666.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,875.20 : 20,820.36 = 5,108.84 : x
  2. Step 2: Convert to fraction form
    13,875.20/20,820.36 = 5,108.84/x
  3. Step 3: Cross multiply
    13,875.20x = 20,820.36 × 5,108.84
  4. Step 4: Simplify right side
    13,875.20x = 106,367,887.98
  5. Step 5: Solve for x
    x = 106,367,887.98/13,875.20
  6. Step 6: Final answer
    x = 7,666.04

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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.