Home / 13,478.90-20,218.35-8,813.30

Finding the Fourth Proportional to 13,478.90, 20,218.35 and 8,813.30

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Solution

The fourth proportional to 13,478.90, 20,218.35 and 8,813.30 is: 13,219.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.90 : 20,218.35 = 8,813.30 : x
  2. Step 2: Convert to fraction form
    13,478.90/20,218.35 = 8,813.30/x
  3. Step 3: Cross multiply
    13,478.90x = 20,218.35 × 8,813.30
  4. Step 4: Simplify right side
    13,478.90x = 178,190,384.06
  5. Step 5: Solve for x
    x = 178,190,384.06/13,478.90
  6. Step 6: Final answer
    x = 13,219.95

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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.