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Finding the Fourth Proportional to 28,521.32, 42,786.97 and 9,803.30

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Solution

The fourth proportional to 28,521.32, 42,786.97 and 9,803.30 is: 14,706.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,521.32 : 42,786.97 = 9,803.30 : x
  2. Step 2: Convert to fraction form
    28,521.32/42,786.97 = 9,803.30/x
  3. Step 3: Cross multiply
    28,521.32x = 42,786.97 × 9,803.30
  4. Step 4: Simplify right side
    28,521.32x = 419,453,264.56
  5. Step 5: Solve for x
    x = 419,453,264.56/28,521.32
  6. Step 6: Final answer
    x = 14,706.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.