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Finding the Fourth Proportional to 19,276.63, 28,914.95 and 5,425.63

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Solution

The fourth proportional to 19,276.63, 28,914.95 and 5,425.63 is: 8,138.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,276.63 : 28,914.95 = 5,425.63 : x
  2. Step 2: Convert to fraction form
    19,276.63/28,914.95 = 5,425.63/x
  3. Step 3: Cross multiply
    19,276.63x = 28,914.95 × 5,425.63
  4. Step 4: Simplify right side
    19,276.63x = 156,881,820.17
  5. Step 5: Solve for x
    x = 156,881,820.17/19,276.63
  6. Step 6: Final answer
    x = 8,138.45

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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.