Home / 20,618.85-28,436.47-13,895.65

Finding the Fourth Proportional to 20,618.85, 28,436.47 and 13,895.65

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Solution

The fourth proportional to 20,618.85, 28,436.47 and 13,895.65 is: 19,164.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.85 : 28,436.47 = 13,895.65 : x
  2. Step 2: Convert to fraction form
    20,618.85/28,436.47 = 13,895.65/x
  3. Step 3: Cross multiply
    20,618.85x = 28,436.47 × 13,895.65
  4. Step 4: Simplify right side
    20,618.85x = 395,143,235.16
  5. Step 5: Solve for x
    x = 395,143,235.16/20,618.85
  6. Step 6: Final answer
    x = 19,164.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.