Home / 28,920.80-43,381.20-18,941.60

Finding the Fourth Proportional to 28,920.80, 43,381.20 and 18,941.60

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Solution

The fourth proportional to 28,920.80, 43,381.20 and 18,941.60 is: 28,412.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.80 : 43,381.20 = 18,941.60 : x
  2. Step 2: Convert to fraction form
    28,920.80/43,381.20 = 18,941.60/x
  3. Step 3: Cross multiply
    28,920.80x = 43,381.20 × 18,941.60
  4. Step 4: Simplify right side
    28,920.80x = 821,709,337.92
  5. Step 5: Solve for x
    x = 821,709,337.92/28,920.80
  6. Step 6: Final answer
    x = 28,412.40

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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.