Home / 20,927.16-31,378.44-8,447.59

Finding the Fourth Proportional to 20,927.16, 31,378.44 and 8,447.59

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Solution

The fourth proportional to 20,927.16, 31,378.44 and 8,447.59 is: 12,666.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.16 : 31,378.44 = 8,447.59 : x
  2. Step 2: Convert to fraction form
    20,927.16/31,378.44 = 8,447.59/x
  3. Step 3: Cross multiply
    20,927.16x = 31,378.44 × 8,447.59
  4. Step 4: Simplify right side
    20,927.16x = 265,072,219.34
  5. Step 5: Solve for x
    x = 265,072,219.34/20,927.16
  6. Step 6: Final answer
    x = 12,666.42

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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.