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Finding the Fourth Proportional to 8,643.69, 12,965.54 and 2,403.70

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Solution

The fourth proportional to 8,643.69, 12,965.54 and 2,403.70 is: 3,605.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.69 : 12,965.54 = 2,403.70 : x
  2. Step 2: Convert to fraction form
    8,643.69/12,965.54 = 2,403.70/x
  3. Step 3: Cross multiply
    8,643.69x = 12,965.54 × 2,403.70
  4. Step 4: Simplify right side
    8,643.69x = 31,165,280.81
  5. Step 5: Solve for x
    x = 31,165,280.81/8,643.69
  6. Step 6: Final answer
    x = 3,605.55

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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.