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Finding the Fourth Proportional to 8,478,044.40, 12,717,844.20 and 2,798,281.20

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Solution

The fourth proportional to 8,478,044.40, 12,717,844.20 and 2,798,281.20 is: 4,197,678.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478,044.40 : 12,717,844.20 = 2,798,281.20 : x
  2. Step 2: Convert to fraction form
    8,478,044.40/12,717,844.20 = 2,798,281.20/x
  3. Step 3: Cross multiply
    8,478,044.40x = 12,717,844.20 × 2,798,281.20
  4. Step 4: Simplify right side
    8,478,044.40x = 35,588,104,329,389.04
  5. Step 5: Solve for x
    x = 35,588,104,329,389.04/8,478,044.40
  6. Step 6: Final answer
    x = 4,197,678.46

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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.