Home / 9,878.21-13,631.80-5,629.53

Finding the Fourth Proportional to 9,878.21, 13,631.80 and 5,629.53

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Solution

The fourth proportional to 9,878.21, 13,631.80 and 5,629.53 is: 7,768.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,878.21 : 13,631.80 = 5,629.53 : x
  2. Step 2: Convert to fraction form
    9,878.21/13,631.80 = 5,629.53/x
  3. Step 3: Cross multiply
    9,878.21x = 13,631.80 × 5,629.53
  4. Step 4: Simplify right side
    9,878.21x = 76,740,558.90
  5. Step 5: Solve for x
    x = 76,740,558.90/9,878.21
  6. Step 6: Final answer
    x = 7,768.67

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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.