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Finding the Fourth Proportional to 18,895,532.40, 28,322,303.40 and 10,381,978.80

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Solution

The fourth proportional to 18,895,532.40, 28,322,303.40 and 10,381,978.80 is: 15,561,432.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,895,532.40 : 28,322,303.40 = 10,381,978.80 : x
  2. Step 2: Convert to fraction form
    18,895,532.40/28,322,303.40 = 10,381,978.80/x
  3. Step 3: Cross multiply
    18,895,532.40x = 28,322,303.40 × 10,381,978.80
  4. Step 4: Simplify right side
    18,895,532.40x = 294,041,553,465,967.94
  5. Step 5: Solve for x
    x = 294,041,553,465,967.94/18,895,532.40
  6. Step 6: Final answer
    x = 15,561,432.58

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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.