Home / 20,411.33-28,165.70-11,457.08

Finding the Fourth Proportional to 20,411.33, 28,165.70 and 11,457.08

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Solution

The fourth proportional to 20,411.33, 28,165.70 and 11,457.08 is: 15,809.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.33 : 28,165.70 = 11,457.08 : x
  2. Step 2: Convert to fraction form
    20,411.33/28,165.70 = 11,457.08/x
  3. Step 3: Cross multiply
    20,411.33x = 28,165.70 × 11,457.08
  4. Step 4: Simplify right side
    20,411.33x = 322,696,777.21
  5. Step 5: Solve for x
    x = 322,696,777.21/20,411.33
  6. Step 6: Final answer
    x = 15,809.69

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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.