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Finding the Fourth Proportional to 19,777.76, 27,303.18 and 11,392.64

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Solution

The fourth proportional to 19,777.76, 27,303.18 and 11,392.64 is: 15,727.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,777.76 : 27,303.18 = 11,392.64 : x
  2. Step 2: Convert to fraction form
    19,777.76/27,303.18 = 11,392.64/x
  3. Step 3: Cross multiply
    19,777.76x = 27,303.18 × 11,392.64
  4. Step 4: Simplify right side
    19,777.76x = 311,055,300.60
  5. Step 5: Solve for x
    x = 311,055,300.60/19,777.76
  6. Step 6: Final answer
    x = 15,727.53

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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.