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Finding the Fourth Proportional to 21,365.62, 29,486.15 and 12,293.76

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Solution

The fourth proportional to 21,365.62, 29,486.15 and 12,293.76 is: 16,966.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,365.62 : 29,486.15 = 12,293.76 : x
  2. Step 2: Convert to fraction form
    21,365.62/29,486.15 = 12,293.76/x
  3. Step 3: Cross multiply
    21,365.62x = 29,486.15 × 12,293.76
  4. Step 4: Simplify right side
    21,365.62x = 362,495,651.42
  5. Step 5: Solve for x
    x = 362,495,651.42/21,365.62
  6. Step 6: Final answer
    x = 16,966.31

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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.