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Finding the Fourth Proportional to 8,671,638.80, 13,004,396.40 and 2,990,541.80

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Solution

The fourth proportional to 8,671,638.80, 13,004,396.40 and 2,990,541.80 is: 4,484,756.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671,638.80 : 13,004,396.40 = 2,990,541.80 : x
  2. Step 2: Convert to fraction form
    8,671,638.80/13,004,396.40 = 2,990,541.80/x
  3. Step 3: Cross multiply
    8,671,638.80x = 13,004,396.40 × 2,990,541.80
  4. Step 4: Simplify right side
    8,671,638.80x = 38,890,191,017,969.52
  5. Step 5: Solve for x
    x = 38,890,191,017,969.52/8,671,638.80
  6. Step 6: Final answer
    x = 4,484,756.79

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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.