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Finding the Fourth Proportional to 13,310.77, 18,368.88 and 7,646.61

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Solution

The fourth proportional to 13,310.77, 18,368.88 and 7,646.61 is: 10,552.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,310.77 : 18,368.88 = 7,646.61 : x
  2. Step 2: Convert to fraction form
    13,310.77/18,368.88 = 7,646.61/x
  3. Step 3: Cross multiply
    13,310.77x = 18,368.88 × 7,646.61
  4. Step 4: Simplify right side
    13,310.77x = 140,459,661.50
  5. Step 5: Solve for x
    x = 140,459,661.50/13,310.77
  6. Step 6: Final answer
    x = 10,552.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.