Home / 13,280.84-19,921.50-3,420.32

Finding the Fourth Proportional to 13,280.84, 19,921.50 and 3,420.32

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Solution

The fourth proportional to 13,280.84, 19,921.50 and 3,420.32 is: 5,130.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.84 : 19,921.50 = 3,420.32 : x
  2. Step 2: Convert to fraction form
    13,280.84/19,921.50 = 3,420.32/x
  3. Step 3: Cross multiply
    13,280.84x = 19,921.50 × 3,420.32
  4. Step 4: Simplify right side
    13,280.84x = 68,137,904.88
  5. Step 5: Solve for x
    x = 68,137,904.88/13,280.84
  6. Step 6: Final answer
    x = 5,130.54

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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.