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Finding the Fourth Proportional to 12,007.10, 18,010.65 and 7,643.90

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Solution

The fourth proportional to 12,007.10, 18,010.65 and 7,643.90 is: 11,465.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,007.10 : 18,010.65 = 7,643.90 : x
  2. Step 2: Convert to fraction form
    12,007.10/18,010.65 = 7,643.90/x
  3. Step 3: Cross multiply
    12,007.10x = 18,010.65 × 7,643.90
  4. Step 4: Simplify right side
    12,007.10x = 137,671,607.54
  5. Step 5: Solve for x
    x = 137,671,607.54/12,007.10
  6. Step 6: Final answer
    x = 11,465.85

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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.