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Finding the Fourth Proportional to 19,866.72, 29,785.65 and 9,331.32

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Solution

The fourth proportional to 19,866.72, 29,785.65 and 9,331.32 is: 13,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,866.72 : 29,785.65 = 9,331.32 : x
  2. Step 2: Convert to fraction form
    19,866.72/29,785.65 = 9,331.32/x
  3. Step 3: Cross multiply
    19,866.72x = 29,785.65 × 9,331.32
  4. Step 4: Simplify right side
    19,866.72x = 277,939,431.56
  5. Step 5: Solve for x
    x = 277,939,431.56/19,866.72
  6. Step 6: Final answer
    x = 13,990.20

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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.