Home / 21,934.72-30,260.64-13,440.16

Finding the Fourth Proportional to 21,934.72, 30,260.64 and 13,440.16

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Solution

The fourth proportional to 21,934.72, 30,260.64 and 13,440.16 is: 18,541.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,934.72 : 30,260.64 = 13,440.16 : x
  2. Step 2: Convert to fraction form
    21,934.72/30,260.64 = 13,440.16/x
  3. Step 3: Cross multiply
    21,934.72x = 30,260.64 × 13,440.16
  4. Step 4: Simplify right side
    21,934.72x = 406,707,843.30
  5. Step 5: Solve for x
    x = 406,707,843.30/21,934.72
  6. Step 6: Final answer
    x = 18,541.74

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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.