Home / 21,127.30-29,211.33-18,502.90

Finding the Fourth Proportional to 21,127.30, 29,211.33 and 18,502.90

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Solution

The fourth proportional to 21,127.30, 29,211.33 and 18,502.90 is: 25,582.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.30 : 29,211.33 = 18,502.90 : x
  2. Step 2: Convert to fraction form
    21,127.30/29,211.33 = 18,502.90/x
  3. Step 3: Cross multiply
    21,127.30x = 29,211.33 × 18,502.90
  4. Step 4: Simplify right side
    21,127.30x = 540,494,317.86
  5. Step 5: Solve for x
    x = 540,494,317.86/21,127.30
  6. Step 6: Final answer
    x = 25,582.74

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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.