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Finding the Fourth Proportional to 18,928.50, 28,393.29 and 5,077.50

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Solution

The fourth proportional to 18,928.50, 28,393.29 and 5,077.50 is: 7,616.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.50 : 28,393.29 = 5,077.50 : x
  2. Step 2: Convert to fraction form
    18,928.50/28,393.29 = 5,077.50/x
  3. Step 3: Cross multiply
    18,928.50x = 28,393.29 × 5,077.50
  4. Step 4: Simplify right side
    18,928.50x = 144,166,929.98
  5. Step 5: Solve for x
    x = 144,166,929.98/18,928.50
  6. Step 6: Final answer
    x = 7,616.39

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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.