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Finding the Fourth Proportional to 9,521.80, 13,113.06 and 9,318.28

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Solution

The fourth proportional to 9,521.80, 13,113.06 and 9,318.28 is: 12,832.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,521.80 : 13,113.06 = 9,318.28 : x
  2. Step 2: Convert to fraction form
    9,521.80/13,113.06 = 9,318.28/x
  3. Step 3: Cross multiply
    9,521.80x = 13,113.06 × 9,318.28
  4. Step 4: Simplify right side
    9,521.80x = 122,191,164.74
  5. Step 5: Solve for x
    x = 122,191,164.74/9,521.80
  6. Step 6: Final answer
    x = 12,832.78

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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.