Home / 20,495.65-28,284.09-11,543.30

Finding the Fourth Proportional to 20,495.65, 28,284.09 and 11,543.30

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Solution

The fourth proportional to 20,495.65, 28,284.09 and 11,543.30 is: 15,929.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,495.65 : 28,284.09 = 11,543.30 : x
  2. Step 2: Convert to fraction form
    20,495.65/28,284.09 = 11,543.30/x
  3. Step 3: Cross multiply
    20,495.65x = 28,284.09 × 11,543.30
  4. Step 4: Simplify right side
    20,495.65x = 326,491,806.81
  5. Step 5: Solve for x
    x = 326,491,806.81/20,495.65
  6. Step 6: Final answer
    x = 15,929.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.