Home / 12,004.12-18,011.58-7,620.40

Finding the Fourth Proportional to 12,004.12, 18,011.58 and 7,620.40

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Solution

The fourth proportional to 12,004.12, 18,011.58 and 7,620.40 is: 11,434.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,004.12 : 18,011.58 = 7,620.40 : x
  2. Step 2: Convert to fraction form
    12,004.12/18,011.58 = 7,620.40/x
  3. Step 3: Cross multiply
    12,004.12x = 18,011.58 × 7,620.40
  4. Step 4: Simplify right side
    12,004.12x = 137,255,444.23
  5. Step 5: Solve for x
    x = 137,255,444.23/12,004.12
  6. Step 6: Final answer
    x = 11,434.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.