Home / 28,412,780.80-42,619,171.20-12,456,428.80

Finding the Fourth Proportional to 28,412,780.80, 42,619,171.20 and 12,456,428.80

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Solution

The fourth proportional to 28,412,780.80, 42,619,171.20 and 12,456,428.80 is: 18,684,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412,780.80 : 42,619,171.20 = 12,456,428.80 : x
  2. Step 2: Convert to fraction form
    28,412,780.80/42,619,171.20 = 12,456,428.80/x
  3. Step 3: Cross multiply
    28,412,780.80x = 42,619,171.20 × 12,456,428.80
  4. Step 4: Simplify right side
    28,412,780.80x = 530,882,671,567,810.62
  5. Step 5: Solve for x
    x = 530,882,671,567,810.62/28,412,780.80
  6. Step 6: Final answer
    x = 18,684,643.20

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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.