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Finding the Fourth Proportional to 28,740.71, 43,111.08 and 7,964.21

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Solution

The fourth proportional to 28,740.71, 43,111.08 and 7,964.21 is: 11,946.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,740.71 : 43,111.08 = 7,964.21 : x
  2. Step 2: Convert to fraction form
    28,740.71/43,111.08 = 7,964.21/x
  3. Step 3: Cross multiply
    28,740.71x = 43,111.08 × 7,964.21
  4. Step 4: Simplify right side
    28,740.71x = 343,345,694.45
  5. Step 5: Solve for x
    x = 343,345,694.45/28,740.71
  6. Step 6: Final answer
    x = 11,946.32

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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.