Home / 28,610.76-39,485.16-15,865.20

Finding the Fourth Proportional to 28,610.76, 39,485.16 and 15,865.20

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Solution

The fourth proportional to 28,610.76, 39,485.16 and 15,865.20 is: 21,895.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,610.76 : 39,485.16 = 15,865.20 : x
  2. Step 2: Convert to fraction form
    28,610.76/39,485.16 = 15,865.20/x
  3. Step 3: Cross multiply
    28,610.76x = 39,485.16 × 15,865.20
  4. Step 4: Simplify right side
    28,610.76x = 626,439,960.43
  5. Step 5: Solve for x
    x = 626,439,960.43/28,610.76
  6. Step 6: Final answer
    x = 21,895.26

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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.