Home / 20,525.20-30,739.20-13,915.60

Finding the Fourth Proportional to 20,525.20, 30,739.20 and 13,915.60

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Solution

The fourth proportional to 20,525.20, 30,739.20 and 13,915.60 is: 20,840.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,525.20 : 30,739.20 = 13,915.60 : x
  2. Step 2: Convert to fraction form
    20,525.20/30,739.20 = 13,915.60/x
  3. Step 3: Cross multiply
    20,525.20x = 30,739.20 × 13,915.60
  4. Step 4: Simplify right side
    20,525.20x = 427,754,411.52
  5. Step 5: Solve for x
    x = 427,754,411.52/20,525.20
  6. Step 6: Final answer
    x = 20,840.45

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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.