Home / 28,478.12-39,298.38-15,900.44

Finding the Fourth Proportional to 28,478.12, 39,298.38 and 15,900.44

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Solution

The fourth proportional to 28,478.12, 39,298.38 and 15,900.44 is: 21,941.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.12 : 39,298.38 = 15,900.44 : x
  2. Step 2: Convert to fraction form
    28,478.12/39,298.38 = 15,900.44/x
  3. Step 3: Cross multiply
    28,478.12x = 39,298.38 × 15,900.44
  4. Step 4: Simplify right side
    28,478.12x = 624,861,533.29
  5. Step 5: Solve for x
    x = 624,861,533.29/28,478.12
  6. Step 6: Final answer
    x = 21,941.81

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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.