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Finding the Fourth Proportional to 11,149, 15,388.47 and 7,569.95

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Solution

The fourth proportional to 11,149, 15,388.47 and 7,569.95 is: 10,448.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,149 : 15,388.47 = 7,569.95 : x
  2. Step 2: Convert to fraction form
    11,149/15,388.47 = 7,569.95/x
  3. Step 3: Cross multiply
    11,149x = 15,388.47 × 7,569.95
  4. Step 4: Simplify right side
    11,149x = 116,489,948.48
  5. Step 5: Solve for x
    x = 116,489,948.48/11,149
  6. Step 6: Final answer
    x = 10,448.47

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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.