Home / 20,945.56-31,427.06-8,474.40

Finding the Fourth Proportional to 20,945.56, 31,427.06 and 8,474.40

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Solution

The fourth proportional to 20,945.56, 31,427.06 and 8,474.40 is: 12,715.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.56 : 31,427.06 = 8,474.40 : x
  2. Step 2: Convert to fraction form
    20,945.56/31,427.06 = 8,474.40/x
  3. Step 3: Cross multiply
    20,945.56x = 31,427.06 × 8,474.40
  4. Step 4: Simplify right side
    20,945.56x = 266,325,477.26
  5. Step 5: Solve for x
    x = 266,325,477.26/20,945.56
  6. Step 6: Final answer
    x = 12,715.13

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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.