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Finding the Fourth Proportional to 25,998.40, 39,023.20 and 12,865.60

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Solution

The fourth proportional to 25,998.40, 39,023.20 and 12,865.60 is: 19,311.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,998.40 : 39,023.20 = 12,865.60 : x
  2. Step 2: Convert to fraction form
    25,998.40/39,023.20 = 12,865.60/x
  3. Step 3: Cross multiply
    25,998.40x = 39,023.20 × 12,865.60
  4. Step 4: Simplify right side
    25,998.40x = 502,056,881.92
  5. Step 5: Solve for x
    x = 502,056,881.92/25,998.40
  6. Step 6: Final answer
    x = 19,311.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.