Home / 20,330.69-28,059.29-11,715.19

Finding the Fourth Proportional to 20,330.69, 28,059.29 and 11,715.19

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Solution

The fourth proportional to 20,330.69, 28,059.29 and 11,715.19 is: 16,168.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.69 : 28,059.29 = 11,715.19 : x
  2. Step 2: Convert to fraction form
    20,330.69/28,059.29 = 11,715.19/x
  3. Step 3: Cross multiply
    20,330.69x = 28,059.29 × 11,715.19
  4. Step 4: Simplify right side
    20,330.69x = 328,719,828.82
  5. Step 5: Solve for x
    x = 328,719,828.82/20,330.69
  6. Step 6: Final answer
    x = 16,168.65

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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.