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Finding the Fourth Proportional to 28,533.36, 42,804.96 and 9,815.28

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Solution

The fourth proportional to 28,533.36, 42,804.96 and 9,815.28 is: 14,724.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,533.36 : 42,804.96 = 9,815.28 : x
  2. Step 2: Convert to fraction form
    28,533.36/42,804.96 = 9,815.28/x
  3. Step 3: Cross multiply
    28,533.36x = 42,804.96 × 9,815.28
  4. Step 4: Simplify right side
    28,533.36x = 420,142,667.79
  5. Step 5: Solve for x
    x = 420,142,667.79/28,533.36
  6. Step 6: Final answer
    x = 14,724.61

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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.