Home / 20,876.17-28,809.21-11,316.07

Finding the Fourth Proportional to 20,876.17, 28,809.21 and 11,316.07

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Solution

The fourth proportional to 20,876.17, 28,809.21 and 11,316.07 is: 15,616.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.17 : 28,809.21 = 11,316.07 : x
  2. Step 2: Convert to fraction form
    20,876.17/28,809.21 = 11,316.07/x
  3. Step 3: Cross multiply
    20,876.17x = 28,809.21 × 11,316.07
  4. Step 4: Simplify right side
    20,876.17x = 326,007,037.00
  5. Step 5: Solve for x
    x = 326,007,037.00/20,876.17
  6. Step 6: Final answer
    x = 15,616.23

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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.