Home / 20,577.29-28,396.80-11,145.86

Finding the Fourth Proportional to 20,577.29, 28,396.80 and 11,145.86

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Solution

The fourth proportional to 20,577.29, 28,396.80 and 11,145.86 is: 15,381.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.29 : 28,396.80 = 11,145.86 : x
  2. Step 2: Convert to fraction form
    20,577.29/28,396.80 = 11,145.86/x
  3. Step 3: Cross multiply
    20,577.29x = 28,396.80 × 11,145.86
  4. Step 4: Simplify right side
    20,577.29x = 316,506,615.26
  5. Step 5: Solve for x
    x = 316,506,615.26/20,577.29
  6. Step 6: Final answer
    x = 15,381.35

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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.