Home / 21,985.70-30,354.03-16,940.35

Finding the Fourth Proportional to 21,985.70, 30,354.03 and 16,940.35

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Solution

The fourth proportional to 21,985.70, 30,354.03 and 16,940.35 is: 23,388.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.70 : 30,354.03 = 16,940.35 : x
  2. Step 2: Convert to fraction form
    21,985.70/30,354.03 = 16,940.35/x
  3. Step 3: Cross multiply
    21,985.70x = 30,354.03 × 16,940.35
  4. Step 4: Simplify right side
    21,985.70x = 514,207,655.64
  5. Step 5: Solve for x
    x = 514,207,655.64/21,985.70
  6. Step 6: Final answer
    x = 23,388.28

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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.