Home / 20,697.21-28,562.67-11,265.75

Finding the Fourth Proportional to 20,697.21, 28,562.67 and 11,265.75

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Solution

The fourth proportional to 20,697.21, 28,562.67 and 11,265.75 is: 15,547.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.21 : 28,562.67 = 11,265.75 : x
  2. Step 2: Convert to fraction form
    20,697.21/28,562.67 = 11,265.75/x
  3. Step 3: Cross multiply
    20,697.21x = 28,562.67 × 11,265.75
  4. Step 4: Simplify right side
    20,697.21x = 321,779,899.55
  5. Step 5: Solve for x
    x = 321,779,899.55/20,697.21
  6. Step 6: Final answer
    x = 15,547.02

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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.