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Finding the Fourth Proportional to 13,160.15, 18,160.98 and 7,191.86

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Solution

The fourth proportional to 13,160.15, 18,160.98 and 7,191.86 is: 9,924.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,160.15 : 18,160.98 = 7,191.86 : x
  2. Step 2: Convert to fraction form
    13,160.15/18,160.98 = 7,191.86/x
  3. Step 3: Cross multiply
    13,160.15x = 18,160.98 × 7,191.86
  4. Step 4: Simplify right side
    13,160.15x = 130,611,225.62
  5. Step 5: Solve for x
    x = 130,611,225.62/13,160.15
  6. Step 6: Final answer
    x = 9,924.75

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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.