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Finding the Fourth Proportional to 19,751.76, 27,258.12 and 13,043.28

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Solution

The fourth proportional to 19,751.76, 27,258.12 and 13,043.28 is: 18,000.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,751.76 : 27,258.12 = 13,043.28 : x
  2. Step 2: Convert to fraction form
    19,751.76/27,258.12 = 13,043.28/x
  3. Step 3: Cross multiply
    19,751.76x = 27,258.12 × 13,043.28
  4. Step 4: Simplify right side
    19,751.76x = 355,535,291.43
  5. Step 5: Solve for x
    x = 355,535,291.43/19,751.76
  6. Step 6: Final answer
    x = 18,000.18

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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.