Home / 13,938.21-19,235.31-7,969.87

Finding the Fourth Proportional to 13,938.21, 19,235.31 and 7,969.87

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Solution

The fourth proportional to 13,938.21, 19,235.31 and 7,969.87 is: 10,998.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.21 : 19,235.31 = 7,969.87 : x
  2. Step 2: Convert to fraction form
    13,938.21/19,235.31 = 7,969.87/x
  3. Step 3: Cross multiply
    13,938.21x = 19,235.31 × 7,969.87
  4. Step 4: Simplify right side
    13,938.21x = 153,302,880.26
  5. Step 5: Solve for x
    x = 153,302,880.26/13,938.21
  6. Step 6: Final answer
    x = 10,998.75

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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.