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Finding the Fourth Proportional to 28,173, 38,879.55 and 15,598.56

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Solution

The fourth proportional to 28,173, 38,879.55 and 15,598.56 is: 21,526.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173 : 38,879.55 = 15,598.56 : x
  2. Step 2: Convert to fraction form
    28,173/38,879.55 = 15,598.56/x
  3. Step 3: Cross multiply
    28,173x = 38,879.55 × 15,598.56
  4. Step 4: Simplify right side
    28,173x = 606,464,993.45
  5. Step 5: Solve for x
    x = 606,464,993.45/28,173
  6. Step 6: Final answer
    x = 21,526.46

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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.