Home / 12,385.71-17,092.40-6,720.45

Finding the Fourth Proportional to 12,385.71, 17,092.40 and 6,720.45

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Solution

The fourth proportional to 12,385.71, 17,092.40 and 6,720.45 is: 9,274.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.71 : 17,092.40 = 6,720.45 : x
  2. Step 2: Convert to fraction form
    12,385.71/17,092.40 = 6,720.45/x
  3. Step 3: Cross multiply
    12,385.71x = 17,092.40 × 6,720.45
  4. Step 4: Simplify right side
    12,385.71x = 114,868,619.58
  5. Step 5: Solve for x
    x = 114,868,619.58/12,385.71
  6. Step 6: Final answer
    x = 9,274.29

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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.