Home / 20,779.71-31,146.40-8,296.53

Finding the Fourth Proportional to 20,779.71, 31,146.40 and 8,296.53

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Solution

The fourth proportional to 20,779.71, 31,146.40 and 8,296.53 is: 12,435.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.71 : 31,146.40 = 8,296.53 : x
  2. Step 2: Convert to fraction form
    20,779.71/31,146.40 = 8,296.53/x
  3. Step 3: Cross multiply
    20,779.71x = 31,146.40 × 8,296.53
  4. Step 4: Simplify right side
    20,779.71x = 258,407,041.99
  5. Step 5: Solve for x
    x = 258,407,041.99/20,779.71
  6. Step 6: Final answer
    x = 12,435.55

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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.