Home / 13,515.85-20,275.71-4,156.65

Finding the Fourth Proportional to 13,515.85, 20,275.71 and 4,156.65

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Solution

The fourth proportional to 13,515.85, 20,275.71 and 4,156.65 is: 6,235.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.85 : 20,275.71 = 4,156.65 : x
  2. Step 2: Convert to fraction form
    13,515.85/20,275.71 = 4,156.65/x
  3. Step 3: Cross multiply
    13,515.85x = 20,275.71 × 4,156.65
  4. Step 4: Simplify right side
    13,515.85x = 84,279,014.38
  5. Step 5: Solve for x
    x = 84,279,014.38/13,515.85
  6. Step 6: Final answer
    x = 6,235.57

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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.