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Finding the Fourth Proportional to 8,572.77, 11,829.64 and 5,428.89

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Solution

The fourth proportional to 8,572.77, 11,829.64 and 5,428.89 is: 7,491.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,572.77 : 11,829.64 = 5,428.89 : x
  2. Step 2: Convert to fraction form
    8,572.77/11,829.64 = 5,428.89/x
  3. Step 3: Cross multiply
    8,572.77x = 11,829.64 × 5,428.89
  4. Step 4: Simplify right side
    8,572.77x = 64,221,814.30
  5. Step 5: Solve for x
    x = 64,221,814.30/8,572.77
  6. Step 6: Final answer
    x = 7,491.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.