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Finding the Fourth Proportional to 8,720,603.80, 13,080,905.70 and 8,352,021.40

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Solution

The fourth proportional to 8,720,603.80, 13,080,905.70 and 8,352,021.40 is: 12,528,032.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720,603.80 : 13,080,905.70 = 8,352,021.40 : x
  2. Step 2: Convert to fraction form
    8,720,603.80/13,080,905.70 = 8,352,021.40/x
  3. Step 3: Cross multiply
    8,720,603.80x = 13,080,905.70 × 8,352,021.40
  4. Step 4: Simplify right side
    8,720,603.80x = 109,252,004,337,781.98
  5. Step 5: Solve for x
    x = 109,252,004,337,781.98/8,720,603.80
  6. Step 6: Final answer
    x = 12,528,032.10

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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.