Home / 13,750.22-18,974.40-7,782.50

Finding the Fourth Proportional to 13,750.22, 18,974.40 and 7,782.50

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Solution

The fourth proportional to 13,750.22, 18,974.40 and 7,782.50 is: 10,739.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.22 : 18,974.40 = 7,782.50 : x
  2. Step 2: Convert to fraction form
    13,750.22/18,974.40 = 7,782.50/x
  3. Step 3: Cross multiply
    13,750.22x = 18,974.40 × 7,782.50
  4. Step 4: Simplify right side
    13,750.22x = 147,668,268
  5. Step 5: Solve for x
    x = 147,668,268/13,750.22
  6. Step 6: Final answer
    x = 10,739.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.