Home / 28,129.10-42,137.22-13,352.36

Finding the Fourth Proportional to 28,129.10, 42,137.22 and 13,352.36

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Solution

The fourth proportional to 28,129.10, 42,137.22 and 13,352.36 is: 20,001.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.10 : 42,137.22 = 13,352.36 : x
  2. Step 2: Convert to fraction form
    28,129.10/42,137.22 = 13,352.36/x
  3. Step 3: Cross multiply
    28,129.10x = 42,137.22 × 13,352.36
  4. Step 4: Simplify right side
    28,129.10x = 562,631,330.84
  5. Step 5: Solve for x
    x = 562,631,330.84/28,129.10
  6. Step 6: Final answer
    x = 20,001.75

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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.