Home / 20,345.86-28,075.46-11,391.45

Finding the Fourth Proportional to 20,345.86, 28,075.46 and 11,391.45

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Solution

The fourth proportional to 20,345.86, 28,075.46 and 11,391.45 is: 15,719.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.86 : 28,075.46 = 11,391.45 : x
  2. Step 2: Convert to fraction form
    20,345.86/28,075.46 = 11,391.45/x
  3. Step 3: Cross multiply
    20,345.86x = 28,075.46 × 11,391.45
  4. Step 4: Simplify right side
    20,345.86x = 319,820,198.82
  5. Step 5: Solve for x
    x = 319,820,198.82/20,345.86
  6. Step 6: Final answer
    x = 15,719.18

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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.