Home / 20,995.61-28,973.43-11,564.10

Finding the Fourth Proportional to 20,995.61, 28,973.43 and 11,564.10

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Solution

The fourth proportional to 20,995.61, 28,973.43 and 11,564.10 is: 15,958.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.61 : 28,973.43 = 11,564.10 : x
  2. Step 2: Convert to fraction form
    20,995.61/28,973.43 = 11,564.10/x
  3. Step 3: Cross multiply
    20,995.61x = 28,973.43 × 11,564.10
  4. Step 4: Simplify right side
    20,995.61x = 335,051,641.86
  5. Step 5: Solve for x
    x = 335,051,641.86/20,995.61
  6. Step 6: Final answer
    x = 15,958.18

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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.