Home / 28,180.63-38,890.48-15,605.38

Finding the Fourth Proportional to 28,180.63, 38,890.48 and 15,605.38

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Solution

The fourth proportional to 28,180.63, 38,890.48 and 15,605.38 is: 21,536.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.63 : 38,890.48 = 15,605.38 : x
  2. Step 2: Convert to fraction form
    28,180.63/38,890.48 = 15,605.38/x
  3. Step 3: Cross multiply
    28,180.63x = 38,890.48 × 15,605.38
  4. Step 4: Simplify right side
    28,180.63x = 606,900,718.78
  5. Step 5: Solve for x
    x = 606,900,718.78/28,180.63
  6. Step 6: Final answer
    x = 21,536.09

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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.