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Finding the Fourth Proportional to 9,811.40, 13,533.66 and 8,555.47

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Solution

The fourth proportional to 9,811.40, 13,533.66 and 8,555.47 is: 11,801.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,811.40 : 13,533.66 = 8,555.47 : x
  2. Step 2: Convert to fraction form
    9,811.40/13,533.66 = 8,555.47/x
  3. Step 3: Cross multiply
    9,811.40x = 13,533.66 × 8,555.47
  4. Step 4: Simplify right side
    9,811.40x = 115,786,788.29
  5. Step 5: Solve for x
    x = 115,786,788.29/9,811.40
  6. Step 6: Final answer
    x = 11,801.26

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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.