Home / 20,876.40-31,315.80-6,087.60

Finding the Fourth Proportional to 20,876.40, 31,315.80 and 6,087.60

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Solution

The fourth proportional to 20,876.40, 31,315.80 and 6,087.60 is: 9,131.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.40 : 31,315.80 = 6,087.60 : x
  2. Step 2: Convert to fraction form
    20,876.40/31,315.80 = 6,087.60/x
  3. Step 3: Cross multiply
    20,876.40x = 31,315.80 × 6,087.60
  4. Step 4: Simplify right side
    20,876.40x = 190,638,064.08
  5. Step 5: Solve for x
    x = 190,638,064.08/20,876.40
  6. Step 6: Final answer
    x = 9,131.75

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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.