Home / 21,210.91-29,272.62-13,146.15

Finding the Fourth Proportional to 21,210.91, 29,272.62 and 13,146.15

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Solution

The fourth proportional to 21,210.91, 29,272.62 and 13,146.15 is: 18,142.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.91 : 29,272.62 = 13,146.15 : x
  2. Step 2: Convert to fraction form
    21,210.91/29,272.62 = 13,146.15/x
  3. Step 3: Cross multiply
    21,210.91x = 29,272.62 × 13,146.15
  4. Step 4: Simplify right side
    21,210.91x = 384,822,261.69
  5. Step 5: Solve for x
    x = 384,822,261.69/21,210.91
  6. Step 6: Final answer
    x = 18,142.66

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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.