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Finding the Fourth Proportional to 12,881.19, 17,777.57 and 7,848.39

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Solution

The fourth proportional to 12,881.19, 17,777.57 and 7,848.39 is: 10,831.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.19 : 17,777.57 = 7,848.39 : x
  2. Step 2: Convert to fraction form
    12,881.19/17,777.57 = 7,848.39/x
  3. Step 3: Cross multiply
    12,881.19x = 17,777.57 × 7,848.39
  4. Step 4: Simplify right side
    12,881.19x = 139,525,263.37
  5. Step 5: Solve for x
    x = 139,525,263.37/12,881.19
  6. Step 6: Final answer
    x = 10,831.71

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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.