Home / 28,405.32-39,200.40-15,830.88

Finding the Fourth Proportional to 28,405.32, 39,200.40 and 15,830.88

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Solution

The fourth proportional to 28,405.32, 39,200.40 and 15,830.88 is: 21,847.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.32 : 39,200.40 = 15,830.88 : x
  2. Step 2: Convert to fraction form
    28,405.32/39,200.40 = 15,830.88/x
  3. Step 3: Cross multiply
    28,405.32x = 39,200.40 × 15,830.88
  4. Step 4: Simplify right side
    28,405.32x = 620,576,828.35
  5. Step 5: Solve for x
    x = 620,576,828.35/28,405.32
  6. Step 6: Final answer
    x = 21,847.20

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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.