Home / 28,406.04-39,200.80-15,830.78

Finding the Fourth Proportional to 28,406.04, 39,200.80 and 15,830.78

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Solution

The fourth proportional to 28,406.04, 39,200.80 and 15,830.78 is: 21,846.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.04 : 39,200.80 = 15,830.78 : x
  2. Step 2: Convert to fraction form
    28,406.04/39,200.80 = 15,830.78/x
  3. Step 3: Cross multiply
    28,406.04x = 39,200.80 × 15,830.78
  4. Step 4: Simplify right side
    28,406.04x = 620,579,240.62
  5. Step 5: Solve for x
    x = 620,579,240.62/28,406.04
  6. Step 6: Final answer
    x = 21,846.74

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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.