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Finding the Fourth Proportional to 8,489,547.20, 12,734,320.80 and 4,238,019.20

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Solution

The fourth proportional to 8,489,547.20, 12,734,320.80 and 4,238,019.20 is: 6,357,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489,547.20 : 12,734,320.80 = 4,238,019.20 : x
  2. Step 2: Convert to fraction form
    8,489,547.20/12,734,320.80 = 4,238,019.20/x
  3. Step 3: Cross multiply
    8,489,547.20x = 12,734,320.80 × 4,238,019.20
  4. Step 4: Simplify right side
    8,489,547.20x = 53,968,296,049,359.37
  5. Step 5: Solve for x
    x = 53,968,296,049,359.37/8,489,547.20
  6. Step 6: Final answer
    x = 6,357,028.80

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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.