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Finding the Fourth Proportional to 28,356.54, 42,534.81 and 7,579.50

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Solution

The fourth proportional to 28,356.54, 42,534.81 and 7,579.50 is: 11,369.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.54 : 42,534.81 = 7,579.50 : x
  2. Step 2: Convert to fraction form
    28,356.54/42,534.81 = 7,579.50/x
  3. Step 3: Cross multiply
    28,356.54x = 42,534.81 × 7,579.50
  4. Step 4: Simplify right side
    28,356.54x = 322,392,592.40
  5. Step 5: Solve for x
    x = 322,392,592.40/28,356.54
  6. Step 6: Final answer
    x = 11,369.25

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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.