Home / 30,431.10-45,646.67-12,661.44

Finding the Fourth Proportional to 30,431.10, 45,646.67 and 12,661.44

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Solution

The fourth proportional to 30,431.10, 45,646.67 and 12,661.44 is: 18,992.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,431.10 : 45,646.67 = 12,661.44 : x
  2. Step 2: Convert to fraction form
    30,431.10/45,646.67 = 12,661.44/x
  3. Step 3: Cross multiply
    30,431.10x = 45,646.67 × 12,661.44
  4. Step 4: Simplify right side
    30,431.10x = 577,952,573.40
  5. Step 5: Solve for x
    x = 577,952,573.40/30,431.10
  6. Step 6: Final answer
    x = 18,992.17

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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.