Home / 28,455.60-39,268.70-15,880.35

Finding the Fourth Proportional to 28,455.60, 39,268.70 and 15,880.35

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Solution

The fourth proportional to 28,455.60, 39,268.70 and 15,880.35 is: 21,914.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.60 : 39,268.70 = 15,880.35 : x
  2. Step 2: Convert to fraction form
    28,455.60/39,268.70 = 15,880.35/x
  3. Step 3: Cross multiply
    28,455.60x = 39,268.70 × 15,880.35
  4. Step 4: Simplify right side
    28,455.60x = 623,600,827.45
  5. Step 5: Solve for x
    x = 623,600,827.45/28,455.60
  6. Step 6: Final answer
    x = 21,914.87

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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.