Home / 21,513.48-29,688.66-12,081.84

Finding the Fourth Proportional to 21,513.48, 29,688.66 and 12,081.84

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Solution

The fourth proportional to 21,513.48, 29,688.66 and 12,081.84 is: 16,672.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.48 : 29,688.66 = 12,081.84 : x
  2. Step 2: Convert to fraction form
    21,513.48/29,688.66 = 12,081.84/x
  3. Step 3: Cross multiply
    21,513.48x = 29,688.66 × 12,081.84
  4. Step 4: Simplify right side
    21,513.48x = 358,693,639.93
  5. Step 5: Solve for x
    x = 358,693,639.93/21,513.48
  6. Step 6: Final answer
    x = 16,672.97

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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.