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Finding the Fourth Proportional to 18,994,997.76, 28,492,715.52 and 6,865,382.40

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Solution

The fourth proportional to 18,994,997.76, 28,492,715.52 and 6,865,382.40 is: 10,298,152.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,994,997.76 : 28,492,715.52 = 6,865,382.40 : x
  2. Step 2: Convert to fraction form
    18,994,997.76/28,492,715.52 = 6,865,382.40/x
  3. Step 3: Cross multiply
    18,994,997.76x = 28,492,715.52 × 6,865,382.40
  4. Step 4: Simplify right side
    18,994,997.76x = 195,613,387,659,214.84
  5. Step 5: Solve for x
    x = 195,613,387,659,214.84/18,994,997.76
  6. Step 6: Final answer
    x = 10,298,152.71

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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.