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Finding the Fourth Proportional to 12,481,130.40, 18,721,695.60 and 10,213,648.80

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Solution

The fourth proportional to 12,481,130.40, 18,721,695.60 and 10,213,648.80 is: 15,320,473.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,481,130.40 : 18,721,695.60 = 10,213,648.80 : x
  2. Step 2: Convert to fraction form
    12,481,130.40/18,721,695.60 = 10,213,648.80/x
  3. Step 3: Cross multiply
    12,481,130.40x = 18,721,695.60 × 10,213,648.80
  4. Step 4: Simplify right side
    12,481,130.40x = 191,216,823,798,905.31
  5. Step 5: Solve for x
    x = 191,216,823,798,905.31/12,481,130.40
  6. Step 6: Final answer
    x = 15,320,473.20

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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.