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Finding the Fourth Proportional to 18,915, 26,102.88 and 10,531.68

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Solution

The fourth proportional to 18,915, 26,102.88 and 10,531.68 is: 14,533.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915 : 26,102.88 = 10,531.68 : x
  2. Step 2: Convert to fraction form
    18,915/26,102.88 = 10,531.68/x
  3. Step 3: Cross multiply
    18,915x = 26,102.88 × 10,531.68
  4. Step 4: Simplify right side
    18,915x = 274,907,179.24
  5. Step 5: Solve for x
    x = 274,907,179.24/18,915
  6. Step 6: Final answer
    x = 14,533.82

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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.