Home / 12,478.23-17,220.47-6,813.36

Finding the Fourth Proportional to 12,478.23, 17,220.47 and 6,813.36

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Solution

The fourth proportional to 12,478.23, 17,220.47 and 6,813.36 is: 9,402.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.23 : 17,220.47 = 6,813.36 : x
  2. Step 2: Convert to fraction form
    12,478.23/17,220.47 = 6,813.36/x
  3. Step 3: Cross multiply
    12,478.23x = 17,220.47 × 6,813.36
  4. Step 4: Simplify right side
    12,478.23x = 117,329,227.41
  5. Step 5: Solve for x
    x = 117,329,227.41/12,478.23
  6. Step 6: Final answer
    x = 9,402.71

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Half scale
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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.