Home / 28,485.92-39,310.43-15,739.10

Finding the Fourth Proportional to 28,485.92, 39,310.43 and 15,739.10

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Solution

The fourth proportional to 28,485.92, 39,310.43 and 15,739.10 is: 21,719.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.92 : 39,310.43 = 15,739.10 : x
  2. Step 2: Convert to fraction form
    28,485.92/39,310.43 = 15,739.10/x
  3. Step 3: Cross multiply
    28,485.92x = 39,310.43 × 15,739.10
  4. Step 4: Simplify right side
    28,485.92x = 618,710,788.81
  5. Step 5: Solve for x
    x = 618,710,788.81/28,485.92
  6. Step 6: Final answer
    x = 21,719.88

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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.