Home / 19,881.16-27,428.22-11,378.72

Finding the Fourth Proportional to 19,881.16, 27,428.22 and 11,378.72

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Solution

The fourth proportional to 19,881.16, 27,428.22 and 11,378.72 is: 15,698.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.16 : 27,428.22 = 11,378.72 : x
  2. Step 2: Convert to fraction form
    19,881.16/27,428.22 = 11,378.72/x
  3. Step 3: Cross multiply
    19,881.16x = 27,428.22 × 11,378.72
  4. Step 4: Simplify right side
    19,881.16x = 312,098,035.48
  5. Step 5: Solve for x
    x = 312,098,035.48/19,881.16
  6. Step 6: Final answer
    x = 15,698.18

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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.