Home / 13,953.87-20,928.78-5,186.70

Finding the Fourth Proportional to 13,953.87, 20,928.78 and 5,186.70

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Solution

The fourth proportional to 13,953.87, 20,928.78 and 5,186.70 is: 7,779.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.87 : 20,928.78 = 5,186.70 : x
  2. Step 2: Convert to fraction form
    13,953.87/20,928.78 = 5,186.70/x
  3. Step 3: Cross multiply
    13,953.87x = 20,928.78 × 5,186.70
  4. Step 4: Simplify right side
    13,953.87x = 108,551,303.23
  5. Step 5: Solve for x
    x = 108,551,303.23/13,953.87
  6. Step 6: Final answer
    x = 7,779.30

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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.