Home / 20,746.40-28,640.48-13,200.32

Finding the Fourth Proportional to 20,746.40, 28,640.48 and 13,200.32

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Solution

The fourth proportional to 20,746.40, 28,640.48 and 13,200.32 is: 18,223.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,746.40 : 28,640.48 = 13,200.32 : x
  2. Step 2: Convert to fraction form
    20,746.40/28,640.48 = 13,200.32/x
  3. Step 3: Cross multiply
    20,746.40x = 28,640.48 × 13,200.32
  4. Step 4: Simplify right side
    20,746.40x = 378,063,500.95
  5. Step 5: Solve for x
    x = 378,063,500.95/20,746.40
  6. Step 6: Final answer
    x = 18,223.09

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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.