Home / 21,116.89-29,140.32-11,684.71

Finding the Fourth Proportional to 21,116.89, 29,140.32 and 11,684.71

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Solution

The fourth proportional to 21,116.89, 29,140.32 and 11,684.71 is: 16,124.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.89 : 29,140.32 = 11,684.71 : x
  2. Step 2: Convert to fraction form
    21,116.89/29,140.32 = 11,684.71/x
  3. Step 3: Cross multiply
    21,116.89x = 29,140.32 × 11,684.71
  4. Step 4: Simplify right side
    21,116.89x = 340,496,188.51
  5. Step 5: Solve for x
    x = 340,496,188.51/21,116.89
  6. Step 6: Final answer
    x = 16,124.35

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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.