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Finding the Fourth Proportional to 8,871,237.90, 13,281,973.65 and 8,622,405.90

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Solution

The fourth proportional to 8,871,237.90, 13,281,973.65 and 8,622,405.90 is: 12,909,423.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,871,237.90 : 13,281,973.65 = 8,622,405.90 : x
  2. Step 2: Convert to fraction form
    8,871,237.90/13,281,973.65 = 8,622,405.90/x
  3. Step 3: Cross multiply
    8,871,237.90x = 13,281,973.65 × 8,622,405.90
  4. Step 4: Simplify right side
    8,871,237.90x = 114,522,567,963,404.55
  5. Step 5: Solve for x
    x = 114,522,567,963,404.55/8,871,237.90
  6. Step 6: Final answer
    x = 12,909,423.61

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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.