Home / 20,341.68-28,069.56-11,388.48

Finding the Fourth Proportional to 20,341.68, 28,069.56 and 11,388.48

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Solution

The fourth proportional to 20,341.68, 28,069.56 and 11,388.48 is: 15,715.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,341.68 : 28,069.56 = 11,388.48 : x
  2. Step 2: Convert to fraction form
    20,341.68/28,069.56 = 11,388.48/x
  3. Step 3: Cross multiply
    20,341.68x = 28,069.56 × 11,388.48
  4. Step 4: Simplify right side
    20,341.68x = 319,669,622.67
  5. Step 5: Solve for x
    x = 319,669,622.67/20,341.68
  6. Step 6: Final answer
    x = 15,715.01

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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.