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Finding the Fourth Proportional to 11,495.61, 15,865.66 and 7,021.94

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Solution

The fourth proportional to 11,495.61, 15,865.66 and 7,021.94 is: 9,691.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,495.61 : 15,865.66 = 7,021.94 : x
  2. Step 2: Convert to fraction form
    11,495.61/15,865.66 = 7,021.94/x
  3. Step 3: Cross multiply
    11,495.61x = 15,865.66 × 7,021.94
  4. Step 4: Simplify right side
    11,495.61x = 111,407,598.14
  5. Step 5: Solve for x
    x = 111,407,598.14/11,495.61
  6. Step 6: Final answer
    x = 9,691.32

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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.