Home / 13,285.87-19,931.88-4,520.79

Finding the Fourth Proportional to 13,285.87, 19,931.88 and 4,520.79

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Solution

The fourth proportional to 13,285.87, 19,931.88 and 4,520.79 is: 6,782.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,285.87 : 19,931.88 = 4,520.79 : x
  2. Step 2: Convert to fraction form
    13,285.87/19,931.88 = 4,520.79/x
  3. Step 3: Cross multiply
    13,285.87x = 19,931.88 × 4,520.79
  4. Step 4: Simplify right side
    13,285.87x = 90,107,843.79
  5. Step 5: Solve for x
    x = 90,107,843.79/13,285.87
  6. Step 6: Final answer
    x = 6,782.23

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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.