Home / 13,905.90-19,190.18-7,618.28

Finding the Fourth Proportional to 13,905.90, 19,190.18 and 7,618.28

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Solution

The fourth proportional to 13,905.90, 19,190.18 and 7,618.28 is: 10,513.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.90 : 19,190.18 = 7,618.28 : x
  2. Step 2: Convert to fraction form
    13,905.90/19,190.18 = 7,618.28/x
  3. Step 3: Cross multiply
    13,905.90x = 19,190.18 × 7,618.28
  4. Step 4: Simplify right side
    13,905.90x = 146,196,164.49
  5. Step 5: Solve for x
    x = 146,196,164.49/13,905.90
  6. Step 6: Final answer
    x = 10,513.25

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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.