Home / 13,790.64-20,702.16-7,219.92

Finding the Fourth Proportional to 13,790.64, 20,702.16 and 7,219.92

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Solution

The fourth proportional to 13,790.64, 20,702.16 and 7,219.92 is: 10,838.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.64 : 20,702.16 = 7,219.92 : x
  2. Step 2: Convert to fraction form
    13,790.64/20,702.16 = 7,219.92/x
  3. Step 3: Cross multiply
    13,790.64x = 20,702.16 × 7,219.92
  4. Step 4: Simplify right side
    13,790.64x = 149,467,939.03
  5. Step 5: Solve for x
    x = 149,467,939.03/13,790.64
  6. Step 6: Final answer
    x = 10,838.36

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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.