Home / 20,138.93-27,799.47-13,422.10

Finding the Fourth Proportional to 20,138.93, 27,799.47 and 13,422.10

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Solution

The fourth proportional to 20,138.93, 27,799.47 and 13,422.10 is: 18,527.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.93 : 27,799.47 = 13,422.10 : x
  2. Step 2: Convert to fraction form
    20,138.93/27,799.47 = 13,422.10/x
  3. Step 3: Cross multiply
    20,138.93x = 27,799.47 × 13,422.10
  4. Step 4: Simplify right side
    20,138.93x = 373,127,266.29
  5. Step 5: Solve for x
    x = 373,127,266.29/20,138.93
  6. Step 6: Final answer
    x = 18,527.67

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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.