Home / 28,581.12-42,868.80-7,806.72

Finding the Fourth Proportional to 28,581.12, 42,868.80 and 7,806.72

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Solution

The fourth proportional to 28,581.12, 42,868.80 and 7,806.72 is: 11,709.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,581.12 : 42,868.80 = 7,806.72 : x
  2. Step 2: Convert to fraction form
    28,581.12/42,868.80 = 7,806.72/x
  3. Step 3: Cross multiply
    28,581.12x = 42,868.80 × 7,806.72
  4. Step 4: Simplify right side
    28,581.12x = 334,664,718.34
  5. Step 5: Solve for x
    x = 334,664,718.34/28,581.12
  6. Step 6: Final answer
    x = 11,709.29

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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.