Home / 21,101.55-29,116.90-12,147.32

Finding the Fourth Proportional to 21,101.55, 29,116.90 and 12,147.32

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Solution

The fourth proportional to 21,101.55, 29,116.90 and 12,147.32 is: 16,761.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.55 : 29,116.90 = 12,147.32 : x
  2. Step 2: Convert to fraction form
    21,101.55/29,116.90 = 12,147.32/x
  3. Step 3: Cross multiply
    21,101.55x = 29,116.90 × 12,147.32
  4. Step 4: Simplify right side
    21,101.55x = 353,692,225.90
  5. Step 5: Solve for x
    x = 353,692,225.90/21,101.55
  6. Step 6: Final answer
    x = 16,761.44

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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.