Home / 28,018.67-38,665.78-15,271.86

Finding the Fourth Proportional to 28,018.67, 38,665.78 and 15,271.86

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Solution

The fourth proportional to 28,018.67, 38,665.78 and 15,271.86 is: 21,075.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.67 : 38,665.78 = 15,271.86 : x
  2. Step 2: Convert to fraction form
    28,018.67/38,665.78 = 15,271.86/x
  3. Step 3: Cross multiply
    28,018.67x = 38,665.78 × 15,271.86
  4. Step 4: Simplify right side
    28,018.67x = 590,498,378.95
  5. Step 5: Solve for x
    x = 590,498,378.95/28,018.67
  6. Step 6: Final answer
    x = 21,075.18

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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.