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Finding the Fourth Proportional to 21,062.76, 29,064.60 and 12,567.48

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Solution

The fourth proportional to 21,062.76, 29,064.60 and 12,567.48 is: 17,341.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,062.76 : 29,064.60 = 12,567.48 : x
  2. Step 2: Convert to fraction form
    21,062.76/29,064.60 = 12,567.48/x
  3. Step 3: Cross multiply
    21,062.76x = 29,064.60 × 12,567.48
  4. Step 4: Simplify right side
    21,062.76x = 365,268,779.21
  5. Step 5: Solve for x
    x = 365,268,779.21/21,062.76
  6. Step 6: Final answer
    x = 17,341.92

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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.