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Finding the Fourth Proportional to 12,506,492.80, 18,759,739.20 and 11,809,763.20

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Solution

The fourth proportional to 12,506,492.80, 18,759,739.20 and 11,809,763.20 is: 17,714,644.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,506,492.80 : 18,759,739.20 = 11,809,763.20 : x
  2. Step 2: Convert to fraction form
    12,506,492.80/18,759,739.20 = 11,809,763.20/x
  3. Step 3: Cross multiply
    12,506,492.80x = 18,759,739.20 × 11,809,763.20
  4. Step 4: Simplify right side
    12,506,492.80x = 221,548,077,645,757.41
  5. Step 5: Solve for x
    x = 221,548,077,645,757.41/12,506,492.80
  6. Step 6: Final answer
    x = 17,714,644.80

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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.