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Finding the Fourth Proportional to 28,935.46, 43,406.30 and 9,209.40

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Solution

The fourth proportional to 28,935.46, 43,406.30 and 9,209.40 is: 13,815.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,935.46 : 43,406.30 = 9,209.40 : x
  2. Step 2: Convert to fraction form
    28,935.46/43,406.30 = 9,209.40/x
  3. Step 3: Cross multiply
    28,935.46x = 43,406.30 × 9,209.40
  4. Step 4: Simplify right side
    28,935.46x = 399,745,979.22
  5. Step 5: Solve for x
    x = 399,745,979.22/28,935.46
  6. Step 6: Final answer
    x = 13,815.09

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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.