Home / 9,905.16-13,668.87-5,428.71

Finding the Fourth Proportional to 9,905.16, 13,668.87 and 5,428.71

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Solution

The fourth proportional to 9,905.16, 13,668.87 and 5,428.71 is: 7,491.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,905.16 : 13,668.87 = 5,428.71 : x
  2. Step 2: Convert to fraction form
    9,905.16/13,668.87 = 5,428.71/x
  3. Step 3: Cross multiply
    9,905.16x = 13,668.87 × 5,428.71
  4. Step 4: Simplify right side
    9,905.16x = 74,204,331.26
  5. Step 5: Solve for x
    x = 74,204,331.26/9,905.16
  6. Step 6: Final answer
    x = 7,491.48

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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.