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Finding the Fourth Proportional to 13,173.94, 18,178.65 and 7,868.02

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Solution

The fourth proportional to 13,173.94, 18,178.65 and 7,868.02 is: 10,857.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,173.94 : 18,178.65 = 7,868.02 : x
  2. Step 2: Convert to fraction form
    13,173.94/18,178.65 = 7,868.02/x
  3. Step 3: Cross multiply
    13,173.94x = 18,178.65 × 7,868.02
  4. Step 4: Simplify right side
    13,173.94x = 143,029,981.77
  5. Step 5: Solve for x
    x = 143,029,981.77/13,173.94
  6. Step 6: Final answer
    x = 10,857.04

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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.