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Finding the Fourth Proportional to 19,489.68, 26,888.76 and 11,101.32

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Solution

The fourth proportional to 19,489.68, 26,888.76 and 11,101.32 is: 15,315.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.68 : 26,888.76 = 11,101.32 : x
  2. Step 2: Convert to fraction form
    19,489.68/26,888.76 = 11,101.32/x
  3. Step 3: Cross multiply
    19,489.68x = 26,888.76 × 11,101.32
  4. Step 4: Simplify right side
    19,489.68x = 298,500,729.16
  5. Step 5: Solve for x
    x = 298,500,729.16/19,489.68
  6. Step 6: Final answer
    x = 15,315.84

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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.