Home / 20,509.35-28,302.90-11,077.91

Finding the Fourth Proportional to 20,509.35, 28,302.90 and 11,077.91

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Solution

The fourth proportional to 20,509.35, 28,302.90 and 11,077.91 is: 15,287.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.35 : 28,302.90 = 11,077.91 : x
  2. Step 2: Convert to fraction form
    20,509.35/28,302.90 = 11,077.91/x
  3. Step 3: Cross multiply
    20,509.35x = 28,302.90 × 11,077.91
  4. Step 4: Simplify right side
    20,509.35x = 313,536,978.94
  5. Step 5: Solve for x
    x = 313,536,978.94/20,509.35
  6. Step 6: Final answer
    x = 15,287.51

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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.