Home / 19,689.76-29,535.68-18,693.28

Finding the Fourth Proportional to 19,689.76, 29,535.68 and 18,693.28

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Solution

The fourth proportional to 19,689.76, 29,535.68 and 18,693.28 is: 28,040.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,689.76 : 29,535.68 = 18,693.28 : x
  2. Step 2: Convert to fraction form
    19,689.76/29,535.68 = 18,693.28/x
  3. Step 3: Cross multiply
    19,689.76x = 29,535.68 × 18,693.28
  4. Step 4: Simplify right side
    19,689.76x = 552,118,736.23
  5. Step 5: Solve for x
    x = 552,118,736.23/19,689.76
  6. Step 6: Final answer
    x = 28,040.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.