Home / 20,880.81-31,315.07-6,085.76

Finding the Fourth Proportional to 20,880.81, 31,315.07 and 6,085.76

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Solution

The fourth proportional to 20,880.81, 31,315.07 and 6,085.76 is: 9,126.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.81 : 31,315.07 = 6,085.76 : x
  2. Step 2: Convert to fraction form
    20,880.81/31,315.07 = 6,085.76/x
  3. Step 3: Cross multiply
    20,880.81x = 31,315.07 × 6,085.76
  4. Step 4: Simplify right side
    20,880.81x = 190,576,000.40
  5. Step 5: Solve for x
    x = 190,576,000.40/20,880.81
  6. Step 6: Final answer
    x = 9,126.85

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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.