Home / 9,681.09-13,358.81-5,431.28

Finding the Fourth Proportional to 9,681.09, 13,358.81 and 5,431.28

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Solution

The fourth proportional to 9,681.09, 13,358.81 and 5,431.28 is: 7,494.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,681.09 : 13,358.81 = 5,431.28 : x
  2. Step 2: Convert to fraction form
    9,681.09/13,358.81 = 5,431.28/x
  3. Step 3: Cross multiply
    9,681.09x = 13,358.81 × 5,431.28
  4. Step 4: Simplify right side
    9,681.09x = 72,555,343.63
  5. Step 5: Solve for x
    x = 72,555,343.63/9,681.09
  6. Step 6: Final answer
    x = 7,494.54

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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.