Home / 20,345.38-28,075.21-13,629.92

Finding the Fourth Proportional to 20,345.38, 28,075.21 and 13,629.92

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Solution

The fourth proportional to 20,345.38, 28,075.21 and 13,629.92 is: 18,808.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.38 : 28,075.21 = 13,629.92 : x
  2. Step 2: Convert to fraction form
    20,345.38/28,075.21 = 13,629.92/x
  3. Step 3: Cross multiply
    20,345.38x = 28,075.21 × 13,629.92
  4. Step 4: Simplify right side
    20,345.38x = 382,662,866.28
  5. Step 5: Solve for x
    x = 382,662,866.28/20,345.38
  6. Step 6: Final answer
    x = 18,808.34

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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.