Home / 9,138.88-13,701-8,623.72

Finding the Fourth Proportional to 9,138.88, 13,701 and 8,623.72

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Solution

The fourth proportional to 9,138.88, 13,701 and 8,623.72 is: 12,928.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.88 : 13,701 = 8,623.72 : x
  2. Step 2: Convert to fraction form
    9,138.88/13,701 = 8,623.72/x
  3. Step 3: Cross multiply
    9,138.88x = 13,701 × 8,623.72
  4. Step 4: Simplify right side
    9,138.88x = 118,153,587.72
  5. Step 5: Solve for x
    x = 118,153,587.72/9,138.88
  6. Step 6: Final answer
    x = 12,928.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.