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Finding the Fourth Proportional to 28,955.21, 43,431.73 and 10,487.21

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Solution

The fourth proportional to 28,955.21, 43,431.73 and 10,487.21 is: 15,730.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,955.21 : 43,431.73 = 10,487.21 : x
  2. Step 2: Convert to fraction form
    28,955.21/43,431.73 = 10,487.21/x
  3. Step 3: Cross multiply
    28,955.21x = 43,431.73 × 10,487.21
  4. Step 4: Simplify right side
    28,955.21x = 455,477,429.80
  5. Step 5: Solve for x
    x = 455,477,429.80/28,955.21
  6. Step 6: Final answer
    x = 15,730.42

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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.