Home / 28,409.60-42,628.47-20,894.62

Finding the Fourth Proportional to 28,409.60, 42,628.47 and 20,894.62

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Solution

The fourth proportional to 28,409.60, 42,628.47 and 20,894.62 is: 31,352.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.60 : 42,628.47 = 20,894.62 : x
  2. Step 2: Convert to fraction form
    28,409.60/42,628.47 = 20,894.62/x
  3. Step 3: Cross multiply
    28,409.60x = 42,628.47 × 20,894.62
  4. Step 4: Simplify right side
    28,409.60x = 890,705,575.26
  5. Step 5: Solve for x
    x = 890,705,575.26/28,409.60
  6. Step 6: Final answer
    x = 31,352.28

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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.