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Finding the Fourth Proportional to 8,717.90, 13,069.28 and 3,520.40

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Solution

The fourth proportional to 8,717.90, 13,069.28 and 3,520.40 is: 5,277.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,717.90 : 13,069.28 = 3,520.40 : x
  2. Step 2: Convert to fraction form
    8,717.90/13,069.28 = 3,520.40/x
  3. Step 3: Cross multiply
    8,717.90x = 13,069.28 × 3,520.40
  4. Step 4: Simplify right side
    8,717.90x = 46,009,036.77
  5. Step 5: Solve for x
    x = 46,009,036.77/8,717.90
  6. Step 6: Final answer
    x = 5,277.54

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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.