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Finding the Fourth Proportional to 8,969.94, 13,454.91 and 3,126.40

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Solution

The fourth proportional to 8,969.94, 13,454.91 and 3,126.40 is: 4,689.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,969.94 : 13,454.91 = 3,126.40 : x
  2. Step 2: Convert to fraction form
    8,969.94/13,454.91 = 3,126.40/x
  3. Step 3: Cross multiply
    8,969.94x = 13,454.91 × 3,126.40
  4. Step 4: Simplify right side
    8,969.94x = 42,065,396.99
  5. Step 5: Solve for x
    x = 42,065,396.99/8,969.94
  6. Step 6: Final answer
    x = 4,689.60

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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.