Home / 13,899.53-20,860.25-5,136.95

Finding the Fourth Proportional to 13,899.53, 20,860.25 and 5,136.95

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Solution

The fourth proportional to 13,899.53, 20,860.25 and 5,136.95 is: 7,709.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,899.53 : 20,860.25 = 5,136.95 : x
  2. Step 2: Convert to fraction form
    13,899.53/20,860.25 = 5,136.95/x
  3. Step 3: Cross multiply
    13,899.53x = 20,860.25 × 5,136.95
  4. Step 4: Simplify right side
    13,899.53x = 107,157,931.25
  5. Step 5: Solve for x
    x = 107,157,931.25/13,899.53
  6. Step 6: Final answer
    x = 7,709.47

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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.