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Finding the Fourth Proportional to 13,492,981.41, 18,620,754.42 and 7,381,409.91

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Solution

The fourth proportional to 13,492,981.41, 18,620,754.42 and 7,381,409.91 is: 10,186,586.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,492,981.41 : 18,620,754.42 = 7,381,409.91 : x
  2. Step 2: Convert to fraction form
    13,492,981.41/18,620,754.42 = 7,381,409.91/x
  3. Step 3: Cross multiply
    13,492,981.41x = 18,620,754.42 × 7,381,409.91
  4. Step 4: Simplify right side
    13,492,981.41x = 137,447,421,207,464.31
  5. Step 5: Solve for x
    x = 137,447,421,207,464.31/13,492,981.41
  6. Step 6: Final answer
    x = 10,186,586.42

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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.