Home / 20,721.24-28,595.52-11,289.96

Finding the Fourth Proportional to 20,721.24, 28,595.52 and 11,289.96

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Solution

The fourth proportional to 20,721.24, 28,595.52 and 11,289.96 is: 15,580.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.24 : 28,595.52 = 11,289.96 : x
  2. Step 2: Convert to fraction form
    20,721.24/28,595.52 = 11,289.96/x
  3. Step 3: Cross multiply
    20,721.24x = 28,595.52 × 11,289.96
  4. Step 4: Simplify right side
    20,721.24x = 322,842,276.98
  5. Step 5: Solve for x
    x = 322,842,276.98/20,721.24
  6. Step 6: Final answer
    x = 15,580.26

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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.