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Finding the Fourth Proportional to 28,061.90, 42,092.74 and 7,285.40

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Solution

The fourth proportional to 28,061.90, 42,092.74 and 7,285.40 is: 10,928.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,061.90 : 42,092.74 = 7,285.40 : x
  2. Step 2: Convert to fraction form
    28,061.90/42,092.74 = 7,285.40/x
  3. Step 3: Cross multiply
    28,061.90x = 42,092.74 × 7,285.40
  4. Step 4: Simplify right side
    28,061.90x = 306,662,219.32
  5. Step 5: Solve for x
    x = 306,662,219.32/28,061.90
  6. Step 6: Final answer
    x = 10,928.07

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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.