Home / 28,360.12-39,136.30-15,784.60

Finding the Fourth Proportional to 28,360.12, 39,136.30 and 15,784.60

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Solution

The fourth proportional to 28,360.12, 39,136.30 and 15,784.60 is: 21,782.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,360.12 : 39,136.30 = 15,784.60 : x
  2. Step 2: Convert to fraction form
    28,360.12/39,136.30 = 15,784.60/x
  3. Step 3: Cross multiply
    28,360.12x = 39,136.30 × 15,784.60
  4. Step 4: Simplify right side
    28,360.12x = 617,750,840.98
  5. Step 5: Solve for x
    x = 617,750,840.98/28,360.12
  6. Step 6: Final answer
    x = 21,782.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.