Home / 21,370.86-29,492.19-11,939.40

Finding the Fourth Proportional to 21,370.86, 29,492.19 and 11,939.40

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Solution

The fourth proportional to 21,370.86, 29,492.19 and 11,939.40 is: 16,476.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.86 : 29,492.19 = 11,939.40 : x
  2. Step 2: Convert to fraction form
    21,370.86/29,492.19 = 11,939.40/x
  3. Step 3: Cross multiply
    21,370.86x = 29,492.19 × 11,939.40
  4. Step 4: Simplify right side
    21,370.86x = 352,119,053.29
  5. Step 5: Solve for x
    x = 352,119,053.29/21,370.86
  6. Step 6: Final answer
    x = 16,476.60

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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.