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Finding the Fourth Proportional to 8,556.40, 11,807.00 and 4,970.43

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Solution

The fourth proportional to 8,556.40, 11,807.00 and 4,970.43 is: 6,858.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,556.40 : 11,807.00 = 4,970.43 : x
  2. Step 2: Convert to fraction form
    8,556.40/11,807.00 = 4,970.43/x
  3. Step 3: Cross multiply
    8,556.40x = 11,807.00 × 4,970.43
  4. Step 4: Simplify right side
    8,556.40x = 58,685,860.80
  5. Step 5: Solve for x
    x = 58,685,860.80/8,556.40
  6. Step 6: Final answer
    x = 6,858.71

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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.