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Finding the Fourth Proportional to 19,970.97, 29,966.79 and 8,885.31

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Solution

The fourth proportional to 19,970.97, 29,966.79 and 8,885.31 is: 13,332.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,970.97 : 29,966.79 = 8,885.31 : x
  2. Step 2: Convert to fraction form
    19,970.97/29,966.79 = 8,885.31/x
  3. Step 3: Cross multiply
    19,970.97x = 29,966.79 × 8,885.31
  4. Step 4: Simplify right side
    19,970.97x = 266,264,218.85
  5. Step 5: Solve for x
    x = 266,264,218.85/19,970.97
  6. Step 6: Final answer
    x = 13,332.56

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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.