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Finding the Fourth Proportional to 18,678.64, 25,779.36 and 10,614.64

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Solution

The fourth proportional to 18,678.64, 25,779.36 and 10,614.64 is: 14,649.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.64 : 25,779.36 = 10,614.64 : x
  2. Step 2: Convert to fraction form
    18,678.64/25,779.36 = 10,614.64/x
  3. Step 3: Cross multiply
    18,678.64x = 25,779.36 × 10,614.64
  4. Step 4: Simplify right side
    18,678.64x = 273,638,625.83
  5. Step 5: Solve for x
    x = 273,638,625.83/18,678.64
  6. Step 6: Final answer
    x = 14,649.82

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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.