Home / 15,705.30-21,672.93-8,990.49

Finding the Fourth Proportional to 15,705.30, 21,672.93 and 8,990.49

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Solution

The fourth proportional to 15,705.30, 21,672.93 and 8,990.49 is: 12,406.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,705.30 : 21,672.93 = 8,990.49 : x
  2. Step 2: Convert to fraction form
    15,705.30/21,672.93 = 8,990.49/x
  3. Step 3: Cross multiply
    15,705.30x = 21,672.93 × 8,990.49
  4. Step 4: Simplify right side
    15,705.30x = 194,850,260.44
  5. Step 5: Solve for x
    x = 194,850,260.44/15,705.30
  6. Step 6: Final answer
    x = 12,406.66

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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.