Home / 28,362.64-39,140.43-15,790.36

Finding the Fourth Proportional to 28,362.64, 39,140.43 and 15,790.36

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Solution

The fourth proportional to 28,362.64, 39,140.43 and 15,790.36 is: 21,790.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.64 : 39,140.43 = 15,790.36 : x
  2. Step 2: Convert to fraction form
    28,362.64/39,140.43 = 15,790.36/x
  3. Step 3: Cross multiply
    28,362.64x = 39,140.43 × 15,790.36
  4. Step 4: Simplify right side
    28,362.64x = 618,041,480.25
  5. Step 5: Solve for x
    x = 618,041,480.25/28,362.64
  6. Step 6: Final answer
    x = 21,790.69

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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.