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Finding the Fourth Proportional to 8,969.79, 13,454.69 and 4,288.70

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Solution

The fourth proportional to 8,969.79, 13,454.69 and 4,288.70 is: 6,433.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,969.79 : 13,454.69 = 4,288.70 : x
  2. Step 2: Convert to fraction form
    8,969.79/13,454.69 = 4,288.70/x
  3. Step 3: Cross multiply
    8,969.79x = 13,454.69 × 4,288.70
  4. Step 4: Simplify right side
    8,969.79x = 57,703,089.64
  5. Step 5: Solve for x
    x = 57,703,089.64/8,969.79
  6. Step 6: Final answer
    x = 6,433.05

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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.