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Finding the Fourth Proportional to 18,807.58, 28,214.94 and 7,563.78

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Solution

The fourth proportional to 18,807.58, 28,214.94 and 7,563.78 is: 11,347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.58 : 28,214.94 = 7,563.78 : x
  2. Step 2: Convert to fraction form
    18,807.58/28,214.94 = 7,563.78/x
  3. Step 3: Cross multiply
    18,807.58x = 28,214.94 × 7,563.78
  4. Step 4: Simplify right side
    18,807.58x = 213,411,598.87
  5. Step 5: Solve for x
    x = 213,411,598.87/18,807.58
  6. Step 6: Final answer
    x = 11,347.11

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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.