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Finding the Fourth Proportional to 40,809.40, 61,203.30 and 12,729.40

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Solution

The fourth proportional to 40,809.40, 61,203.30 and 12,729.40 is: 19,090.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,809.40 : 61,203.30 = 12,729.40 : x
  2. Step 2: Convert to fraction form
    40,809.40/61,203.30 = 12,729.40/x
  3. Step 3: Cross multiply
    40,809.40x = 61,203.30 × 12,729.40
  4. Step 4: Simplify right side
    40,809.40x = 779,081,287.02
  5. Step 5: Solve for x
    x = 779,081,287.02/40,809.40
  6. Step 6: Final answer
    x = 19,090.73

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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.