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Finding the Fourth Proportional to 28,772.48, 43,157.76 and 12,356.48

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Solution

The fourth proportional to 28,772.48, 43,157.76 and 12,356.48 is: 18,534.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,772.48 : 43,157.76 = 12,356.48 : x
  2. Step 2: Convert to fraction form
    28,772.48/43,157.76 = 12,356.48/x
  3. Step 3: Cross multiply
    28,772.48x = 43,157.76 × 12,356.48
  4. Step 4: Simplify right side
    28,772.48x = 533,277,998.28
  5. Step 5: Solve for x
    x = 533,277,998.28/28,772.48
  6. Step 6: Final answer
    x = 18,534.31

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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.