Home / 13,106.79-18,087.28-7,138.44

Finding the Fourth Proportional to 13,106.79, 18,087.28 and 7,138.44

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Solution

The fourth proportional to 13,106.79, 18,087.28 and 7,138.44 is: 9,851.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.79 : 18,087.28 = 7,138.44 : x
  2. Step 2: Convert to fraction form
    13,106.79/18,087.28 = 7,138.44/x
  3. Step 3: Cross multiply
    13,106.79x = 18,087.28 × 7,138.44
  4. Step 4: Simplify right side
    13,106.79x = 129,114,945.20
  5. Step 5: Solve for x
    x = 129,114,945.20/13,106.79
  6. Step 6: Final answer
    x = 9,851.00

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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.