Home / 18,992.10-28,488.34-12,459.72

Finding the Fourth Proportional to 18,992.10, 28,488.34 and 12,459.72

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Solution

The fourth proportional to 18,992.10, 28,488.34 and 12,459.72 is: 18,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.10 : 28,488.34 = 12,459.72 : x
  2. Step 2: Convert to fraction form
    18,992.10/28,488.34 = 12,459.72/x
  3. Step 3: Cross multiply
    18,992.10x = 28,488.34 × 12,459.72
  4. Step 4: Simplify right side
    18,992.10x = 354,956,739.66
  5. Step 5: Solve for x
    x = 354,956,739.66/18,992.10
  6. Step 6: Final answer
    x = 18,689.70

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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.