Home / 18,818.84-28,228.28-4,779.92

Finding the Fourth Proportional to 18,818.84, 28,228.28 and 4,779.92

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Solution

The fourth proportional to 18,818.84, 28,228.28 and 4,779.92 is: 7,169.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.84 : 28,228.28 = 4,779.92 : x
  2. Step 2: Convert to fraction form
    18,818.84/28,228.28 = 4,779.92/x
  3. Step 3: Cross multiply
    18,818.84x = 28,228.28 × 4,779.92
  4. Step 4: Simplify right side
    18,818.84x = 134,928,920.14
  5. Step 5: Solve for x
    x = 134,928,920.14/18,818.84
  6. Step 6: Final answer
    x = 7,169.89

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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.