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Finding the Fourth Proportional to 12,603,929.90, 18,915,226.05 and 8,342,681.90

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Solution

The fourth proportional to 12,603,929.90, 18,915,226.05 and 8,342,681.90 is: 12,520,199.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603,929.90 : 18,915,226.05 = 8,342,681.90 : x
  2. Step 2: Convert to fraction form
    12,603,929.90/18,915,226.05 = 8,342,681.90/x
  3. Step 3: Cross multiply
    12,603,929.90x = 18,915,226.05 × 8,342,681.90
  4. Step 4: Simplify right side
    12,603,929.90x = 157,803,714,001,743.50
  5. Step 5: Solve for x
    x = 157,803,714,001,743.50/12,603,929.90
  6. Step 6: Final answer
    x = 12,520,199.28

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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.