Home / 21,617.93-29,828.20-13,124.50

Finding the Fourth Proportional to 21,617.93, 29,828.20 and 13,124.50

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Solution

The fourth proportional to 21,617.93, 29,828.20 and 13,124.50 is: 18,109.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,617.93 : 29,828.20 = 13,124.50 : x
  2. Step 2: Convert to fraction form
    21,617.93/29,828.20 = 13,124.50/x
  3. Step 3: Cross multiply
    21,617.93x = 29,828.20 × 13,124.50
  4. Step 4: Simplify right side
    21,617.93x = 391,480,210.90
  5. Step 5: Solve for x
    x = 391,480,210.90/21,617.93
  6. Step 6: Final answer
    x = 18,109.05

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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.