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Finding the Fourth Proportional to 17,528.40, 26,228.60 and 12,920.40

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Solution

The fourth proportional to 17,528.40, 26,228.60 and 12,920.40 is: 19,333.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,528.40 : 26,228.60 = 12,920.40 : x
  2. Step 2: Convert to fraction form
    17,528.40/26,228.60 = 12,920.40/x
  3. Step 3: Cross multiply
    17,528.40x = 26,228.60 × 12,920.40
  4. Step 4: Simplify right side
    17,528.40x = 338,884,003.44
  5. Step 5: Solve for x
    x = 338,884,003.44/17,528.40
  6. Step 6: Final answer
    x = 19,333.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.