Home / 20,341.30-28,069.66-11,388.72

Finding the Fourth Proportional to 20,341.30, 28,069.66 and 11,388.72

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Solution

The fourth proportional to 20,341.30, 28,069.66 and 11,388.72 is: 15,715.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,341.30 : 28,069.66 = 11,388.72 : x
  2. Step 2: Convert to fraction form
    20,341.30/28,069.66 = 11,388.72/x
  3. Step 3: Cross multiply
    20,341.30x = 28,069.66 × 11,388.72
  4. Step 4: Simplify right side
    20,341.30x = 319,677,300.94
  5. Step 5: Solve for x
    x = 319,677,300.94/20,341.30
  6. Step 6: Final answer
    x = 15,715.68

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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.