Home / 13,926.90-19,219.18-7,639.26

Finding the Fourth Proportional to 13,926.90, 19,219.18 and 7,639.26

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Solution

The fourth proportional to 13,926.90, 19,219.18 and 7,639.26 is: 10,542.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,926.90 : 19,219.18 = 7,639.26 : x
  2. Step 2: Convert to fraction form
    13,926.90/19,219.18 = 7,639.26/x
  3. Step 3: Cross multiply
    13,926.90x = 19,219.18 × 7,639.26
  4. Step 4: Simplify right side
    13,926.90x = 146,820,313.01
  5. Step 5: Solve for x
    x = 146,820,313.01/13,926.90
  6. Step 6: Final answer
    x = 10,542.21

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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.