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Finding the Fourth Proportional to 8,851.40, 13,208.57 and 7,869.80

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Solution

The fourth proportional to 8,851.40, 13,208.57 and 7,869.80 is: 11,743.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,851.40 : 13,208.57 = 7,869.80 : x
  2. Step 2: Convert to fraction form
    8,851.40/13,208.57 = 7,869.80/x
  3. Step 3: Cross multiply
    8,851.40x = 13,208.57 × 7,869.80
  4. Step 4: Simplify right side
    8,851.40x = 103,948,804.19
  5. Step 5: Solve for x
    x = 103,948,804.19/8,851.40
  6. Step 6: Final answer
    x = 11,743.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.