Home / 28,122.40-38,805.84-15,544.72

Finding the Fourth Proportional to 28,122.40, 38,805.84 and 15,544.72

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Solution

The fourth proportional to 28,122.40, 38,805.84 and 15,544.72 is: 21,450.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,122.40 : 38,805.84 = 15,544.72 : x
  2. Step 2: Convert to fraction form
    28,122.40/38,805.84 = 15,544.72/x
  3. Step 3: Cross multiply
    28,122.40x = 38,805.84 × 15,544.72
  4. Step 4: Simplify right side
    28,122.40x = 603,225,917.16
  5. Step 5: Solve for x
    x = 603,225,917.16/28,122.40
  6. Step 6: Final answer
    x = 21,450.02

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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.