Home / 28,242.12-38,974.32-15,667.68

Finding the Fourth Proportional to 28,242.12, 38,974.32 and 15,667.68

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Solution

The fourth proportional to 28,242.12, 38,974.32 and 15,667.68 is: 21,621.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,242.12 : 38,974.32 = 15,667.68 : x
  2. Step 2: Convert to fraction form
    28,242.12/38,974.32 = 15,667.68/x
  3. Step 3: Cross multiply
    28,242.12x = 38,974.32 × 15,667.68
  4. Step 4: Simplify right side
    28,242.12x = 610,637,173.98
  5. Step 5: Solve for x
    x = 610,637,173.98/28,242.12
  6. Step 6: Final answer
    x = 21,621.51

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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.