Home / 20,858.90-31,289.72-8,377.30

Finding the Fourth Proportional to 20,858.90, 31,289.72 and 8,377.30

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Solution

The fourth proportional to 20,858.90, 31,289.72 and 8,377.30 is: 12,566.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.90 : 31,289.72 = 8,377.30 : x
  2. Step 2: Convert to fraction form
    20,858.90/31,289.72 = 8,377.30/x
  3. Step 3: Cross multiply
    20,858.90x = 31,289.72 × 8,377.30
  4. Step 4: Simplify right side
    20,858.90x = 262,123,368.58
  5. Step 5: Solve for x
    x = 262,123,368.58/20,858.90
  6. Step 6: Final answer
    x = 12,566.50

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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.