Home / 21,012.39-31,518.69-6,221.59

Finding the Fourth Proportional to 21,012.39, 31,518.69 and 6,221.59

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Solution

The fourth proportional to 21,012.39, 31,518.69 and 6,221.59 is: 9,332.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.39 : 31,518.69 = 6,221.59 : x
  2. Step 2: Convert to fraction form
    21,012.39/31,518.69 = 6,221.59/x
  3. Step 3: Cross multiply
    21,012.39x = 31,518.69 × 6,221.59
  4. Step 4: Simplify right side
    21,012.39x = 196,096,366.52
  5. Step 5: Solve for x
    x = 196,096,366.52/21,012.39
  6. Step 6: Final answer
    x = 9,332.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.