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Finding the Fourth Proportional to 9,866.36, 13,615.16 and 5,389.90

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Solution

The fourth proportional to 9,866.36, 13,615.16 and 5,389.90 is: 7,437.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,866.36 : 13,615.16 = 5,389.90 : x
  2. Step 2: Convert to fraction form
    9,866.36/13,615.16 = 5,389.90/x
  3. Step 3: Cross multiply
    9,866.36x = 13,615.16 × 5,389.90
  4. Step 4: Simplify right side
    9,866.36x = 73,384,289.90
  5. Step 5: Solve for x
    x = 73,384,289.90/9,866.36
  6. Step 6: Final answer
    x = 7,437.83

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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.