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Finding the Fourth Proportional to 28,572.48, 42,858.24 and 7,795.98

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Solution

The fourth proportional to 28,572.48, 42,858.24 and 7,795.98 is: 11,693.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,572.48 : 42,858.24 = 7,795.98 : x
  2. Step 2: Convert to fraction form
    28,572.48/42,858.24 = 7,795.98/x
  3. Step 3: Cross multiply
    28,572.48x = 42,858.24 × 7,795.98
  4. Step 4: Simplify right side
    28,572.48x = 334,121,981.88
  5. Step 5: Solve for x
    x = 334,121,981.88/28,572.48
  6. Step 6: Final answer
    x = 11,693.84

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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.