Home / 20,411.38-28,165.77-11,457.13

Finding the Fourth Proportional to 20,411.38, 28,165.77 and 11,457.13

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Solution

The fourth proportional to 20,411.38, 28,165.77 and 11,457.13 is: 15,809.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.38 : 28,165.77 = 11,457.13 : x
  2. Step 2: Convert to fraction form
    20,411.38/28,165.77 = 11,457.13/x
  3. Step 3: Cross multiply
    20,411.38x = 28,165.77 × 11,457.13
  4. Step 4: Simplify right side
    20,411.38x = 322,698,888.44
  5. Step 5: Solve for x
    x = 322,698,888.44/20,411.38
  6. Step 6: Final answer
    x = 15,809.75

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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.