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Finding the Fourth Proportional to 28,591.95, 42,887.93 and 7,815.45

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Solution

The fourth proportional to 28,591.95, 42,887.93 and 7,815.45 is: 11,723.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,591.95 : 42,887.93 = 7,815.45 : x
  2. Step 2: Convert to fraction form
    28,591.95/42,887.93 = 7,815.45/x
  3. Step 3: Cross multiply
    28,591.95x = 42,887.93 × 7,815.45
  4. Step 4: Simplify right side
    28,591.95x = 335,188,638.23
  5. Step 5: Solve for x
    x = 335,188,638.23/28,591.95
  6. Step 6: Final answer
    x = 11,723.18

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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.