Home / 13,870.08-20,813.63-5,105.07

Finding the Fourth Proportional to 13,870.08, 20,813.63 and 5,105.07

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Solution

The fourth proportional to 13,870.08, 20,813.63 and 5,105.07 is: 7,660.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.08 : 20,813.63 = 5,105.07 : x
  2. Step 2: Convert to fraction form
    13,870.08/20,813.63 = 5,105.07/x
  3. Step 3: Cross multiply
    13,870.08x = 20,813.63 × 5,105.07
  4. Step 4: Simplify right side
    13,870.08x = 106,255,012.58
  5. Step 5: Solve for x
    x = 106,255,012.58/13,870.08
  6. Step 6: Final answer
    x = 7,660.74

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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.