Home / 13,870.72-20,834.70-13,271.86

Finding the Fourth Proportional to 13,870.72, 20,834.70 and 13,271.86

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Solution

The fourth proportional to 13,870.72, 20,834.70 and 13,271.86 is: 19,935.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.72 : 20,834.70 = 13,271.86 : x
  2. Step 2: Convert to fraction form
    13,870.72/20,834.70 = 13,271.86/x
  3. Step 3: Cross multiply
    13,870.72x = 20,834.70 × 13,271.86
  4. Step 4: Simplify right side
    13,870.72x = 276,515,221.54
  5. Step 5: Solve for x
    x = 276,515,221.54/13,870.72
  6. Step 6: Final answer
    x = 19,935.17

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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.