Home / 28,280.64-39,027.52-15,705.60

Finding the Fourth Proportional to 28,280.64, 39,027.52 and 15,705.60

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Solution

The fourth proportional to 28,280.64, 39,027.52 and 15,705.60 is: 21,673.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,280.64 : 39,027.52 = 15,705.60 : x
  2. Step 2: Convert to fraction form
    28,280.64/39,027.52 = 15,705.60/x
  3. Step 3: Cross multiply
    28,280.64x = 39,027.52 × 15,705.60
  4. Step 4: Simplify right side
    28,280.64x = 612,950,618.11
  5. Step 5: Solve for x
    x = 612,950,618.11/28,280.64
  6. Step 6: Final answer
    x = 21,673.86

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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.