Home / 13,245.40-18,280.40-8,543.35

Finding the Fourth Proportional to 13,245.40, 18,280.40 and 8,543.35

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Solution

The fourth proportional to 13,245.40, 18,280.40 and 8,543.35 is: 11,790.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.40 : 18,280.40 = 8,543.35 : x
  2. Step 2: Convert to fraction form
    13,245.40/18,280.40 = 8,543.35/x
  3. Step 3: Cross multiply
    13,245.40x = 18,280.40 × 8,543.35
  4. Step 4: Simplify right side
    13,245.40x = 156,175,721.22
  5. Step 5: Solve for x
    x = 156,175,721.22/13,245.40
  6. Step 6: Final answer
    x = 11,790.94

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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.