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Finding the Fourth Proportional to 13,205.55, 19,811.55 and 4,321.40

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Solution

The fourth proportional to 13,205.55, 19,811.55 and 4,321.40 is: 6,483.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.55 : 19,811.55 = 4,321.40 : x
  2. Step 2: Convert to fraction form
    13,205.55/19,811.55 = 4,321.40/x
  3. Step 3: Cross multiply
    13,205.55x = 19,811.55 × 4,321.40
  4. Step 4: Simplify right side
    13,205.55x = 85,613,632.17
  5. Step 5: Solve for x
    x = 85,613,632.17/13,205.55
  6. Step 6: Final answer
    x = 6,483.16

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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.