Home / 15,114.12-20,857.67-8,400.16

Finding the Fourth Proportional to 15,114.12, 20,857.67 and 8,400.16

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Solution

The fourth proportional to 15,114.12, 20,857.67 and 8,400.16 is: 11,592.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,114.12 : 20,857.67 = 8,400.16 : x
  2. Step 2: Convert to fraction form
    15,114.12/20,857.67 = 8,400.16/x
  3. Step 3: Cross multiply
    15,114.12x = 20,857.67 × 8,400.16
  4. Step 4: Simplify right side
    15,114.12x = 175,207,765.23
  5. Step 5: Solve for x
    x = 175,207,765.23/15,114.12
  6. Step 6: Final answer
    x = 11,592.32

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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.