Home / 28,583.93-42,898.28-18,720.65

Finding the Fourth Proportional to 28,583.93, 42,898.28 and 18,720.65

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Solution

The fourth proportional to 28,583.93, 42,898.28 and 18,720.65 is: 28,095.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,583.93 : 42,898.28 = 18,720.65 : x
  2. Step 2: Convert to fraction form
    28,583.93/42,898.28 = 18,720.65/x
  3. Step 3: Cross multiply
    28,583.93x = 42,898.28 × 18,720.65
  4. Step 4: Simplify right side
    28,583.93x = 803,083,591.88
  5. Step 5: Solve for x
    x = 803,083,591.88/28,583.93
  6. Step 6: Final answer
    x = 28,095.63

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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.