Home / 20,888.60-31,315.34-9,789.44

Finding the Fourth Proportional to 20,888.60, 31,315.34 and 9,789.44

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Solution

The fourth proportional to 20,888.60, 31,315.34 and 9,789.44 is: 14,675.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.60 : 31,315.34 = 9,789.44 : x
  2. Step 2: Convert to fraction form
    20,888.60/31,315.34 = 9,789.44/x
  3. Step 3: Cross multiply
    20,888.60x = 31,315.34 × 9,789.44
  4. Step 4: Simplify right side
    20,888.60x = 306,559,642.01
  5. Step 5: Solve for x
    x = 306,559,642.01/20,888.60
  6. Step 6: Final answer
    x = 14,675.93

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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.