Home / 20,622.74-28,459.89-11,191.28

Finding the Fourth Proportional to 20,622.74, 28,459.89 and 11,191.28

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Solution

The fourth proportional to 20,622.74, 28,459.89 and 11,191.28 is: 15,444.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.74 : 28,459.89 = 11,191.28 : x
  2. Step 2: Convert to fraction form
    20,622.74/28,459.89 = 11,191.28/x
  3. Step 3: Cross multiply
    20,622.74x = 28,459.89 × 11,191.28
  4. Step 4: Simplify right side
    20,622.74x = 318,502,455.46
  5. Step 5: Solve for x
    x = 318,502,455.46/20,622.74
  6. Step 6: Final answer
    x = 15,444.24

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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.