Home / 21,781.42-30,058.34-12,349.98

Finding the Fourth Proportional to 21,781.42, 30,058.34 and 12,349.98

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Solution

The fourth proportional to 21,781.42, 30,058.34 and 12,349.98 is: 17,042.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.42 : 30,058.34 = 12,349.98 : x
  2. Step 2: Convert to fraction form
    21,781.42/30,058.34 = 12,349.98/x
  3. Step 3: Cross multiply
    21,781.42x = 30,058.34 × 12,349.98
  4. Step 4: Simplify right side
    21,781.42x = 371,219,836.08
  5. Step 5: Solve for x
    x = 371,219,836.08/21,781.42
  6. Step 6: Final answer
    x = 17,042.96

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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.