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Finding the Fourth Proportional to 18,856.68, 28,291.50 and 11,828.22

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Solution

The fourth proportional to 18,856.68, 28,291.50 and 11,828.22 is: 17,746.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,856.68 : 28,291.50 = 11,828.22 : x
  2. Step 2: Convert to fraction form
    18,856.68/28,291.50 = 11,828.22/x
  3. Step 3: Cross multiply
    18,856.68x = 28,291.50 × 11,828.22
  4. Step 4: Simplify right side
    18,856.68x = 334,638,086.13
  5. Step 5: Solve for x
    x = 334,638,086.13/18,856.68
  6. Step 6: Final answer
    x = 17,746.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.