Home / 20,955.32-31,370.56-13,538.12

Finding the Fourth Proportional to 20,955.32, 31,370.56 and 13,538.12

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Solution

The fourth proportional to 20,955.32, 31,370.56 and 13,538.12 is: 20,266.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.32 : 31,370.56 = 13,538.12 : x
  2. Step 2: Convert to fraction form
    20,955.32/31,370.56 = 13,538.12/x
  3. Step 3: Cross multiply
    20,955.32x = 31,370.56 × 13,538.12
  4. Step 4: Simplify right side
    20,955.32x = 424,698,405.75
  5. Step 5: Solve for x
    x = 424,698,405.75/20,955.32
  6. Step 6: Final answer
    x = 20,266.85

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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.