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Finding the Fourth Proportional to 18,804.48, 25,951.20 and 10,421.76

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Solution

The fourth proportional to 18,804.48, 25,951.20 and 10,421.76 is: 14,382.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.48 : 25,951.20 = 10,421.76 : x
  2. Step 2: Convert to fraction form
    18,804.48/25,951.20 = 10,421.76/x
  3. Step 3: Cross multiply
    18,804.48x = 25,951.20 × 10,421.76
  4. Step 4: Simplify right side
    18,804.48x = 270,457,178.11
  5. Step 5: Solve for x
    x = 270,457,178.11/18,804.48
  6. Step 6: Final answer
    x = 14,382.59

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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.