Home / 20,352.31-28,095.81-13,642.32

Finding the Fourth Proportional to 20,352.31, 28,095.81 and 13,642.32

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Solution

The fourth proportional to 20,352.31, 28,095.81 and 13,642.32 is: 18,832.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,352.31 : 28,095.81 = 13,642.32 : x
  2. Step 2: Convert to fraction form
    20,352.31/28,095.81 = 13,642.32/x
  3. Step 3: Cross multiply
    20,352.31x = 28,095.81 × 13,642.32
  4. Step 4: Simplify right side
    20,352.31x = 383,292,161.62
  5. Step 5: Solve for x
    x = 383,292,161.62/20,352.31
  6. Step 6: Final answer
    x = 18,832.85

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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.