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Finding the Fourth Proportional to 28,490.76, 42,736.14 and 7,714.26

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Solution

The fourth proportional to 28,490.76, 42,736.14 and 7,714.26 is: 11,571.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.76 : 42,736.14 = 7,714.26 : x
  2. Step 2: Convert to fraction form
    28,490.76/42,736.14 = 7,714.26/x
  3. Step 3: Cross multiply
    28,490.76x = 42,736.14 × 7,714.26
  4. Step 4: Simplify right side
    28,490.76x = 329,677,695.36
  5. Step 5: Solve for x
    x = 329,677,695.36/28,490.76
  6. Step 6: Final answer
    x = 11,571.39

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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.