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Finding the Fourth Proportional to 8,659,409.80, 12,986,052.90 and 2,978,312.80

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Solution

The fourth proportional to 8,659,409.80, 12,986,052.90 and 2,978,312.80 is: 4,466,416.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659,409.80 : 12,986,052.90 = 2,978,312.80 : x
  2. Step 2: Convert to fraction form
    8,659,409.80/12,986,052.90 = 2,978,312.80/x
  3. Step 3: Cross multiply
    8,659,409.80x = 12,986,052.90 × 2,978,312.80
  4. Step 4: Simplify right side
    8,659,409.80x = 38,676,527,573,547.12
  5. Step 5: Solve for x
    x = 38,676,527,573,547.12/8,659,409.80
  6. Step 6: Final answer
    x = 4,466,416.13

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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.