Home / 20,139.35-27,795.93-11,640.29

Finding the Fourth Proportional to 20,139.35, 27,795.93 and 11,640.29

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Solution

The fourth proportional to 20,139.35, 27,795.93 and 11,640.29 is: 16,065.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.35 : 27,795.93 = 11,640.29 : x
  2. Step 2: Convert to fraction form
    20,139.35/27,795.93 = 11,640.29/x
  3. Step 3: Cross multiply
    20,139.35x = 27,795.93 × 11,640.29
  4. Step 4: Simplify right side
    20,139.35x = 323,552,547.04
  5. Step 5: Solve for x
    x = 323,552,547.04/20,139.35
  6. Step 6: Final answer
    x = 16,065.69

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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.