Home / 28,640.87-42,939.70-18,782.63

Finding the Fourth Proportional to 28,640.87, 42,939.70 and 18,782.63

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Solution

The fourth proportional to 28,640.87, 42,939.70 and 18,782.63 is: 28,159.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,640.87 : 42,939.70 = 18,782.63 : x
  2. Step 2: Convert to fraction form
    28,640.87/42,939.70 = 18,782.63/x
  3. Step 3: Cross multiply
    28,640.87x = 42,939.70 × 18,782.63
  4. Step 4: Simplify right side
    28,640.87x = 806,520,235.76
  5. Step 5: Solve for x
    x = 806,520,235.76/28,640.87
  6. Step 6: Final answer
    x = 28,159.77

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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.