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Finding the Fourth Proportional to 11,512.71, 15,888.95 and 6,477.14

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Solution

The fourth proportional to 11,512.71, 15,888.95 and 6,477.14 is: 8,939.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,512.71 : 15,888.95 = 6,477.14 : x
  2. Step 2: Convert to fraction form
    11,512.71/15,888.95 = 6,477.14/x
  3. Step 3: Cross multiply
    11,512.71x = 15,888.95 × 6,477.14
  4. Step 4: Simplify right side
    11,512.71x = 102,914,985.23
  5. Step 5: Solve for x
    x = 102,914,985.23/11,512.71
  6. Step 6: Final answer
    x = 8,939.25

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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.