Home / 12,400.64-17,118.18-7,621.32

Finding the Fourth Proportional to 12,400.64, 17,118.18 and 7,621.32

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Solution

The fourth proportional to 12,400.64, 17,118.18 and 7,621.32 is: 10,520.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,400.64 : 17,118.18 = 7,621.32 : x
  2. Step 2: Convert to fraction form
    12,400.64/17,118.18 = 7,621.32/x
  3. Step 3: Cross multiply
    12,400.64x = 17,118.18 × 7,621.32
  4. Step 4: Simplify right side
    12,400.64x = 130,463,127.60
  5. Step 5: Solve for x
    x = 130,463,127.60/12,400.64
  6. Step 6: Final answer
    x = 10,520.68

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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.