Home / 28,085,425.20-42,128,137.80-18,519,487.20

Finding the Fourth Proportional to 28,085,425.20, 42,128,137.80 and 18,519,487.20

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Solution

The fourth proportional to 28,085,425.20, 42,128,137.80 and 18,519,487.20 is: 27,779,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085,425.20 : 42,128,137.80 = 18,519,487.20 : x
  2. Step 2: Convert to fraction form
    28,085,425.20/42,128,137.80 = 18,519,487.20/x
  3. Step 3: Cross multiply
    28,085,425.20x = 42,128,137.80 × 18,519,487.20
  4. Step 4: Simplify right side
    28,085,425.20x = 780,191,508,746,936.12
  5. Step 5: Solve for x
    x = 780,191,508,746,936.12/28,085,425.20
  6. Step 6: Final answer
    x = 27,779,230.80

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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.