Home / 21,123.56-29,157.80-12,174.63

Finding the Fourth Proportional to 21,123.56, 29,157.80 and 12,174.63

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Solution

The fourth proportional to 21,123.56, 29,157.80 and 12,174.63 is: 16,805.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.56 : 29,157.80 = 12,174.63 : x
  2. Step 2: Convert to fraction form
    21,123.56/29,157.80 = 12,174.63/x
  3. Step 3: Cross multiply
    21,123.56x = 29,157.80 × 12,174.63
  4. Step 4: Simplify right side
    21,123.56x = 354,985,426.61
  5. Step 5: Solve for x
    x = 354,985,426.61/21,123.56
  6. Step 6: Final answer
    x = 16,805.19

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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.