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Finding the Fourth Proportional to 19,708.76, 27,200.90 and 11,751.16

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Solution

The fourth proportional to 19,708.76, 27,200.90 and 11,751.16 is: 16,218.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,708.76 : 27,200.90 = 11,751.16 : x
  2. Step 2: Convert to fraction form
    19,708.76/27,200.90 = 11,751.16/x
  3. Step 3: Cross multiply
    19,708.76x = 27,200.90 × 11,751.16
  4. Step 4: Simplify right side
    19,708.76x = 319,642,128.04
  5. Step 5: Solve for x
    x = 319,642,128.04/19,708.76
  6. Step 6: Final answer
    x = 16,218.28

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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.