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Finding the Fourth Proportional to 28,908.40, 42,972.52 and 28,057.08

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Solution

The fourth proportional to 28,908.40, 42,972.52 and 28,057.08 is: 41,707.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,908.40 : 42,972.52 = 28,057.08 : x
  2. Step 2: Convert to fraction form
    28,908.40/42,972.52 = 28,057.08/x
  3. Step 3: Cross multiply
    28,908.40x = 42,972.52 × 28,057.08
  4. Step 4: Simplify right side
    28,908.40x = 1,205,683,431.44
  5. Step 5: Solve for x
    x = 1,205,683,431.44/28,908.40
  6. Step 6: Final answer
    x = 41,707.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.