Home / 21,337.80-29,440.26-13,784.43

Finding the Fourth Proportional to 21,337.80, 29,440.26 and 13,784.43

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Solution

The fourth proportional to 21,337.80, 29,440.26 and 13,784.43 is: 19,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,337.80 : 29,440.26 = 13,784.43 : x
  2. Step 2: Convert to fraction form
    21,337.80/29,440.26 = 13,784.43/x
  3. Step 3: Cross multiply
    21,337.80x = 29,440.26 × 13,784.43
  4. Step 4: Simplify right side
    21,337.80x = 405,817,203.15
  5. Step 5: Solve for x
    x = 405,817,203.15/21,337.80
  6. Step 6: Final answer
    x = 19,018.70

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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.