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Finding the Fourth Proportional to 26,590.40, 39,890.40 and 13,409.60

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Solution

The fourth proportional to 26,590.40, 39,890.40 and 13,409.60 is: 20,116.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,590.40 : 39,890.40 = 13,409.60 : x
  2. Step 2: Convert to fraction form
    26,590.40/39,890.40 = 13,409.60/x
  3. Step 3: Cross multiply
    26,590.40x = 39,890.40 × 13,409.60
  4. Step 4: Simplify right side
    26,590.40x = 534,914,307.84
  5. Step 5: Solve for x
    x = 534,914,307.84/26,590.40
  6. Step 6: Final answer
    x = 20,116.82

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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.