Home / 20,860.60-31,290.63-5,065.76

Finding the Fourth Proportional to 20,860.60, 31,290.63 and 5,065.76

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Solution

The fourth proportional to 20,860.60, 31,290.63 and 5,065.76 is: 7,598.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.60 : 31,290.63 = 5,065.76 : x
  2. Step 2: Convert to fraction form
    20,860.60/31,290.63 = 5,065.76/x
  3. Step 3: Cross multiply
    20,860.60x = 31,290.63 × 5,065.76
  4. Step 4: Simplify right side
    20,860.60x = 158,510,821.83
  5. Step 5: Solve for x
    x = 158,510,821.83/20,860.60
  6. Step 6: Final answer
    x = 7,598.57

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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.