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Finding the Fourth Proportional to 8,604,990.80, 12,888,823.80 and 7,111,998.80

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Solution

The fourth proportional to 8,604,990.80, 12,888,823.80 and 7,111,998.80 is: 10,652,573.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,604,990.80 : 12,888,823.80 = 7,111,998.80 : x
  2. Step 2: Convert to fraction form
    8,604,990.80/12,888,823.80 = 7,111,998.80/x
  3. Step 3: Cross multiply
    8,604,990.80x = 12,888,823.80 × 7,111,998.80
  4. Step 4: Simplify right side
    8,604,990.80x = 91,665,299,399,011.44
  5. Step 5: Solve for x
    x = 91,665,299,399,011.44/8,604,990.80
  6. Step 6: Final answer
    x = 10,652,573.78

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1.5x scale

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.