Home / 20,622.88-28,459.43-11,191.45

Finding the Fourth Proportional to 20,622.88, 28,459.43 and 11,191.45

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Solution

The fourth proportional to 20,622.88, 28,459.43 and 11,191.45 is: 15,444.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.88 : 28,459.43 = 11,191.45 : x
  2. Step 2: Convert to fraction form
    20,622.88/28,459.43 = 11,191.45/x
  3. Step 3: Cross multiply
    20,622.88x = 28,459.43 × 11,191.45
  4. Step 4: Simplify right side
    20,622.88x = 318,502,145.58
  5. Step 5: Solve for x
    x = 318,502,145.58/20,622.88
  6. Step 6: Final answer
    x = 15,444.12

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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.