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Finding the Fourth Proportional to 9,918.48, 13,686.01 and 6,386.48

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Solution

The fourth proportional to 9,918.48, 13,686.01 and 6,386.48 is: 8,812.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.48 : 13,686.01 = 6,386.48 : x
  2. Step 2: Convert to fraction form
    9,918.48/13,686.01 = 6,386.48/x
  3. Step 3: Cross multiply
    9,918.48x = 13,686.01 × 6,386.48
  4. Step 4: Simplify right side
    9,918.48x = 87,405,429.14
  5. Step 5: Solve for x
    x = 87,405,429.14/9,918.48
  6. Step 6: Final answer
    x = 8,812.38

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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.