Home / 13,106.53-18,087.40-7,138.45

Finding the Fourth Proportional to 13,106.53, 18,087.40 and 7,138.45

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Solution

The fourth proportional to 13,106.53, 18,087.40 and 7,138.45 is: 9,851.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.53 : 18,087.40 = 7,138.45 : x
  2. Step 2: Convert to fraction form
    13,106.53/18,087.40 = 7,138.45/x
  3. Step 3: Cross multiply
    13,106.53x = 18,087.40 × 7,138.45
  4. Step 4: Simplify right side
    13,106.53x = 129,116,000.53
  5. Step 5: Solve for x
    x = 129,116,000.53/13,106.53
  6. Step 6: Final answer
    x = 9,851.27

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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.