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Finding the Fourth Proportional to 39,980.48, 59,960.24 and 11,892.98

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Solution

The fourth proportional to 39,980.48, 59,960.24 and 11,892.98 is: 17,836.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,980.48 : 59,960.24 = 11,892.98 : x
  2. Step 2: Convert to fraction form
    39,980.48/59,960.24 = 11,892.98/x
  3. Step 3: Cross multiply
    39,980.48x = 59,960.24 × 11,892.98
  4. Step 4: Simplify right side
    39,980.48x = 713,105,935.12
  5. Step 5: Solve for x
    x = 713,105,935.12/39,980.48
  6. Step 6: Final answer
    x = 17,836.35

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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.