Home / 12,188.24-16,820.16-7,477.28

Finding the Fourth Proportional to 12,188.24, 16,820.16 and 7,477.28

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Solution

The fourth proportional to 12,188.24, 16,820.16 and 7,477.28 is: 10,318.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,188.24 : 16,820.16 = 7,477.28 : x
  2. Step 2: Convert to fraction form
    12,188.24/16,820.16 = 7,477.28/x
  3. Step 3: Cross multiply
    12,188.24x = 16,820.16 × 7,477.28
  4. Step 4: Simplify right side
    12,188.24x = 125,769,045.96
  5. Step 5: Solve for x
    x = 125,769,045.96/12,188.24
  6. Step 6: Final answer
    x = 10,318.88

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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.