Home / 21,017.60-29,023.04-20,021.76

Finding the Fourth Proportional to 21,017.60, 29,023.04 and 20,021.76

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Solution

The fourth proportional to 21,017.60, 29,023.04 and 20,021.76 is: 27,647.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.60 : 29,023.04 = 20,021.76 : x
  2. Step 2: Convert to fraction form
    21,017.60/29,023.04 = 20,021.76/x
  3. Step 3: Cross multiply
    21,017.60x = 29,023.04 × 20,021.76
  4. Step 4: Simplify right side
    21,017.60x = 581,092,341.35
  5. Step 5: Solve for x
    x = 581,092,341.35/21,017.60
  6. Step 6: Final answer
    x = 27,647.89

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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.