Home / 21,764.40-30,040.20-13,271.19

Finding the Fourth Proportional to 21,764.40, 30,040.20 and 13,271.19

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Solution

The fourth proportional to 21,764.40, 30,040.20 and 13,271.19 is: 18,317.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.40 : 30,040.20 = 13,271.19 : x
  2. Step 2: Convert to fraction form
    21,764.40/30,040.20 = 13,271.19/x
  3. Step 3: Cross multiply
    21,764.40x = 30,040.20 × 13,271.19
  4. Step 4: Simplify right side
    21,764.40x = 398,669,258.16
  5. Step 5: Solve for x
    x = 398,669,258.16/21,764.40
  6. Step 6: Final answer
    x = 18,317.50

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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.