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Finding the Fourth Proportional to 8,362,663.80, 12,571,989.30 and 7,130,945.40

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Solution

The fourth proportional to 8,362,663.80, 12,571,989.30 and 7,130,945.40 is: 10,720,288.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,362,663.80 : 12,571,989.30 = 7,130,945.40 : x
  2. Step 2: Convert to fraction form
    8,362,663.80/12,571,989.30 = 7,130,945.40/x
  3. Step 3: Cross multiply
    8,362,663.80x = 12,571,989.30 × 7,130,945.40
  4. Step 4: Simplify right side
    8,362,663.80x = 89,650,169,267,684.23
  5. Step 5: Solve for x
    x = 89,650,169,267,684.23/8,362,663.80
  6. Step 6: Final answer
    x = 10,720,288.58

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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.