Home / 13,855.28-20,771.04-5,085.68

Finding the Fourth Proportional to 13,855.28, 20,771.04 and 5,085.68

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Solution

The fourth proportional to 13,855.28, 20,771.04 and 5,085.68 is: 7,624.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.28 : 20,771.04 = 5,085.68 : x
  2. Step 2: Convert to fraction form
    13,855.28/20,771.04 = 5,085.68/x
  3. Step 3: Cross multiply
    13,855.28x = 20,771.04 × 5,085.68
  4. Step 4: Simplify right side
    13,855.28x = 105,634,862.71
  5. Step 5: Solve for x
    x = 105,634,862.71/13,855.28
  6. Step 6: Final answer
    x = 7,624.16

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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.