Home / 12,280.72-18,421.08-3,515.67

Finding the Fourth Proportional to 12,280.72, 18,421.08 and 3,515.67

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Solution

The fourth proportional to 12,280.72, 18,421.08 and 3,515.67 is: 5,273.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.72 : 18,421.08 = 3,515.67 : x
  2. Step 2: Convert to fraction form
    12,280.72/18,421.08 = 3,515.67/x
  3. Step 3: Cross multiply
    12,280.72x = 18,421.08 × 3,515.67
  4. Step 4: Simplify right side
    12,280.72x = 64,762,438.32
  5. Step 5: Solve for x
    x = 64,762,438.32/12,280.72
  6. Step 6: Final answer
    x = 5,273.51

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Half scale
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Double scale
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Similar ratio
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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.