Home / 13,685.30-20,533.38-4,920.90

Finding the Fourth Proportional to 13,685.30, 20,533.38 and 4,920.90

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Solution

The fourth proportional to 13,685.30, 20,533.38 and 4,920.90 is: 7,383.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.30 : 20,533.38 = 4,920.90 : x
  2. Step 2: Convert to fraction form
    13,685.30/20,533.38 = 4,920.90/x
  3. Step 3: Cross multiply
    13,685.30x = 20,533.38 × 4,920.90
  4. Step 4: Simplify right side
    13,685.30x = 101,042,728.10
  5. Step 5: Solve for x
    x = 101,042,728.10/13,685.30
  6. Step 6: Final answer
    x = 7,383.30

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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.