Home / 20,640.54-28,495.76-13,587.47

Finding the Fourth Proportional to 20,640.54, 28,495.76 and 13,587.47

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Solution

The fourth proportional to 20,640.54, 28,495.76 and 13,587.47 is: 18,758.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.54 : 28,495.76 = 13,587.47 : x
  2. Step 2: Convert to fraction form
    20,640.54/28,495.76 = 13,587.47/x
  3. Step 3: Cross multiply
    20,640.54x = 28,495.76 × 13,587.47
  4. Step 4: Simplify right side
    20,640.54x = 387,185,257.00
  5. Step 5: Solve for x
    x = 387,185,257.00/20,640.54
  6. Step 6: Final answer
    x = 18,758.48

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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.