Home / 15,529.98-21,431.21-8,456.40

Finding the Fourth Proportional to 15,529.98, 21,431.21 and 8,456.40

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Solution

The fourth proportional to 15,529.98, 21,431.21 and 8,456.40 is: 11,669.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.98 : 21,431.21 = 8,456.40 : x
  2. Step 2: Convert to fraction form
    15,529.98/21,431.21 = 8,456.40/x
  3. Step 3: Cross multiply
    15,529.98x = 21,431.21 × 8,456.40
  4. Step 4: Simplify right side
    15,529.98x = 181,230,884.24
  5. Step 5: Solve for x
    x = 181,230,884.24/15,529.98
  6. Step 6: Final answer
    x = 11,669.74

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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.