Home / 21,578.64-29,779.08-12,147.54

Finding the Fourth Proportional to 21,578.64, 29,779.08 and 12,147.54

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Solution

The fourth proportional to 21,578.64, 29,779.08 and 12,147.54 is: 16,763.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,578.64 : 29,779.08 = 12,147.54 : x
  2. Step 2: Convert to fraction form
    21,578.64/29,779.08 = 12,147.54/x
  3. Step 3: Cross multiply
    21,578.64x = 29,779.08 × 12,147.54
  4. Step 4: Simplify right side
    21,578.64x = 361,742,565.46
  5. Step 5: Solve for x
    x = 361,742,565.46/21,578.64
  6. Step 6: Final answer
    x = 16,763.92

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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.