Home / 13,331.40-19,970.70-11,689.80

Finding the Fourth Proportional to 13,331.40, 19,970.70 and 11,689.80

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Solution

The fourth proportional to 13,331.40, 19,970.70 and 11,689.80 is: 17,511.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,331.40 : 19,970.70 = 11,689.80 : x
  2. Step 2: Convert to fraction form
    13,331.40/19,970.70 = 11,689.80/x
  3. Step 3: Cross multiply
    13,331.40x = 19,970.70 × 11,689.80
  4. Step 4: Simplify right side
    13,331.40x = 233,453,488.86
  5. Step 5: Solve for x
    x = 233,453,488.86/13,331.40
  6. Step 6: Final answer
    x = 17,511.55

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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.