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Finding the Fourth Proportional to 9,900.09, 13,661.80 and 5,423.80

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Solution

The fourth proportional to 9,900.09, 13,661.80 and 5,423.80 is: 7,484.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,900.09 : 13,661.80 = 5,423.80 : x
  2. Step 2: Convert to fraction form
    9,900.09/13,661.80 = 5,423.80/x
  3. Step 3: Cross multiply
    9,900.09x = 13,661.80 × 5,423.80
  4. Step 4: Simplify right side
    9,900.09x = 74,098,852.41
  5. Step 5: Solve for x
    x = 74,098,852.41/9,900.09
  6. Step 6: Final answer
    x = 7,484.67

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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.