Home / 13,820.39-19,070.21-8,155.37

Finding the Fourth Proportional to 13,820.39, 19,070.21 and 8,155.37

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Solution

The fourth proportional to 13,820.39, 19,070.21 and 8,155.37 is: 11,253.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.39 : 19,070.21 = 8,155.37 : x
  2. Step 2: Convert to fraction form
    13,820.39/19,070.21 = 8,155.37/x
  3. Step 3: Cross multiply
    13,820.39x = 19,070.21 × 8,155.37
  4. Step 4: Simplify right side
    13,820.39x = 155,524,722.98
  5. Step 5: Solve for x
    x = 155,524,722.98/13,820.39
  6. Step 6: Final answer
    x = 11,253.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.