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Finding the Fourth Proportional to 28,495.26, 42,742.89 and 7,718.76

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Solution

The fourth proportional to 28,495.26, 42,742.89 and 7,718.76 is: 11,578.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,495.26 : 42,742.89 = 7,718.76 : x
  2. Step 2: Convert to fraction form
    28,495.26/42,742.89 = 7,718.76/x
  3. Step 3: Cross multiply
    28,495.26x = 42,742.89 × 7,718.76
  4. Step 4: Simplify right side
    28,495.26x = 329,922,109.62
  5. Step 5: Solve for x
    x = 329,922,109.62/28,495.26
  6. Step 6: Final answer
    x = 11,578.14

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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.