Home / 20,860.72-31,290.81-5,065.89

Finding the Fourth Proportional to 20,860.72, 31,290.81 and 5,065.89

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Solution

The fourth proportional to 20,860.72, 31,290.81 and 5,065.89 is: 7,598.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.72 : 31,290.81 = 5,065.89 : x
  2. Step 2: Convert to fraction form
    20,860.72/31,290.81 = 5,065.89/x
  3. Step 3: Cross multiply
    20,860.72x = 31,290.81 × 5,065.89
  4. Step 4: Simplify right side
    20,860.72x = 158,515,645.02
  5. Step 5: Solve for x
    x = 158,515,645.02/20,860.72
  6. Step 6: Final answer
    x = 7,598.76

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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.