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Finding the Fourth Proportional to 28,551.64, 42,827.64 and 7,775.32

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Solution

The fourth proportional to 28,551.64, 42,827.64 and 7,775.32 is: 11,663.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,551.64 : 42,827.64 = 7,775.32 : x
  2. Step 2: Convert to fraction form
    28,551.64/42,827.64 = 7,775.32/x
  3. Step 3: Cross multiply
    28,551.64x = 42,827.64 × 7,775.32
  4. Step 4: Simplify right side
    28,551.64x = 332,998,605.84
  5. Step 5: Solve for x
    x = 332,998,605.84/28,551.64
  6. Step 6: Final answer
    x = 11,663.03

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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.