Home / 19,703.36-27,179.88-12,621.80

Finding the Fourth Proportional to 19,703.36, 27,179.88 and 12,621.80

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Solution

The fourth proportional to 19,703.36, 27,179.88 and 12,621.80 is: 17,411.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,703.36 : 27,179.88 = 12,621.80 : x
  2. Step 2: Convert to fraction form
    19,703.36/27,179.88 = 12,621.80/x
  3. Step 3: Cross multiply
    19,703.36x = 27,179.88 × 12,621.80
  4. Step 4: Simplify right side
    19,703.36x = 343,059,009.38
  5. Step 5: Solve for x
    x = 343,059,009.38/19,703.36
  6. Step 6: Final answer
    x = 17,411.19

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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.