Home / 13,690.54-20,530.78-6,668.45

Finding the Fourth Proportional to 13,690.54, 20,530.78 and 6,668.45

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Solution

The fourth proportional to 13,690.54, 20,530.78 and 6,668.45 is: 10,000.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.54 : 20,530.78 = 6,668.45 : x
  2. Step 2: Convert to fraction form
    13,690.54/20,530.78 = 6,668.45/x
  3. Step 3: Cross multiply
    13,690.54x = 20,530.78 × 6,668.45
  4. Step 4: Simplify right side
    13,690.54x = 136,908,479.89
  5. Step 5: Solve for x
    x = 136,908,479.89/13,690.54
  6. Step 6: Final answer
    x = 10,000.22

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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.