Home / 21,513.26-29,688.65-12,081.62

Finding the Fourth Proportional to 21,513.26, 29,688.65 and 12,081.62

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Solution

The fourth proportional to 21,513.26, 29,688.65 and 12,081.62 is: 16,672.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.26 : 29,688.65 = 12,081.62 : x
  2. Step 2: Convert to fraction form
    21,513.26/29,688.65 = 12,081.62/x
  3. Step 3: Cross multiply
    21,513.26x = 29,688.65 × 12,081.62
  4. Step 4: Simplify right side
    21,513.26x = 358,686,778.76
  5. Step 5: Solve for x
    x = 358,686,778.76/21,513.26
  6. Step 6: Final answer
    x = 16,672.83

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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.