Home / 20,440.94-28,182.47-13,715.91

Finding the Fourth Proportional to 20,440.94, 28,182.47 and 13,715.91

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Solution

The fourth proportional to 20,440.94, 28,182.47 and 13,715.91 is: 18,910.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.94 : 28,182.47 = 13,715.91 : x
  2. Step 2: Convert to fraction form
    20,440.94/28,182.47 = 13,715.91/x
  3. Step 3: Cross multiply
    20,440.94x = 28,182.47 × 13,715.91
  4. Step 4: Simplify right side
    20,440.94x = 386,548,153.52
  5. Step 5: Solve for x
    x = 386,548,153.52/20,440.94
  6. Step 6: Final answer
    x = 18,910.49

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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.