Home / 21,321.10-31,795.12-20,156.50

Finding the Fourth Proportional to 21,321.10, 31,795.12 and 20,156.50

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Solution

The fourth proportional to 21,321.10, 31,795.12 and 20,156.50 is: 30,058.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.10 : 31,795.12 = 20,156.50 : x
  2. Step 2: Convert to fraction form
    21,321.10/31,795.12 = 20,156.50/x
  3. Step 3: Cross multiply
    21,321.10x = 31,795.12 × 20,156.50
  4. Step 4: Simplify right side
    21,321.10x = 640,878,336.28
  5. Step 5: Solve for x
    x = 640,878,336.28/21,321.10
  6. Step 6: Final answer
    x = 30,058.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.