Home / 20,751.16-28,636.48-11,319.72

Finding the Fourth Proportional to 20,751.16, 28,636.48 and 11,319.72

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Solution

The fourth proportional to 20,751.16, 28,636.48 and 11,319.72 is: 15,621.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.16 : 28,636.48 = 11,319.72 : x
  2. Step 2: Convert to fraction form
    20,751.16/28,636.48 = 11,319.72/x
  3. Step 3: Cross multiply
    20,751.16x = 28,636.48 × 11,319.72
  4. Step 4: Simplify right side
    20,751.16x = 324,156,935.39
  5. Step 5: Solve for x
    x = 324,156,935.39/20,751.16
  6. Step 6: Final answer
    x = 15,621.15

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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.