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Finding the Fourth Proportional to 13,873,090.80, 20,809,636.20 and 13,306,220.40

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Solution

The fourth proportional to 13,873,090.80, 20,809,636.20 and 13,306,220.40 is: 19,959,330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,873,090.80 : 20,809,636.20 = 13,306,220.40 : x
  2. Step 2: Convert to fraction form
    13,873,090.80/20,809,636.20 = 13,306,220.40/x
  3. Step 3: Cross multiply
    13,873,090.80x = 20,809,636.20 × 13,306,220.40
  4. Step 4: Simplify right side
    13,873,090.80x = 276,897,605,721,018.47
  5. Step 5: Solve for x
    x = 276,897,605,721,018.47/13,873,090.80
  6. Step 6: Final answer
    x = 19,959,330.60

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Similar ratio
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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.