Home / 20,860.14-31,290.06-5,277.80

Finding the Fourth Proportional to 20,860.14, 31,290.06 and 5,277.80

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Solution

The fourth proportional to 20,860.14, 31,290.06 and 5,277.80 is: 7,916.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.14 : 31,290.06 = 5,277.80 : x
  2. Step 2: Convert to fraction form
    20,860.14/31,290.06 = 5,277.80/x
  3. Step 3: Cross multiply
    20,860.14x = 31,290.06 × 5,277.80
  4. Step 4: Simplify right side
    20,860.14x = 165,142,678.67
  5. Step 5: Solve for x
    x = 165,142,678.67/20,860.14
  6. Step 6: Final answer
    x = 7,916.66

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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.