Home / 20,970.31-31,466.40-8,499.55

Finding the Fourth Proportional to 20,970.31, 31,466.40 and 8,499.55

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Solution

The fourth proportional to 20,970.31, 31,466.40 and 8,499.55 is: 12,753.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.31 : 31,466.40 = 8,499.55 : x
  2. Step 2: Convert to fraction form
    20,970.31/31,466.40 = 8,499.55/x
  3. Step 3: Cross multiply
    20,970.31x = 31,466.40 × 8,499.55
  4. Step 4: Simplify right side
    20,970.31x = 267,450,161.45
  5. Step 5: Solve for x
    x = 267,450,161.45/20,970.31
  6. Step 6: Final answer
    x = 12,753.75

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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.