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Finding the Fourth Proportional to 21,767.40, 32,653.26 and 7,913.16

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Solution

The fourth proportional to 21,767.40, 32,653.26 and 7,913.16 is: 11,870.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,767.40 : 32,653.26 = 7,913.16 : x
  2. Step 2: Convert to fraction form
    21,767.40/32,653.26 = 7,913.16/x
  3. Step 3: Cross multiply
    21,767.40x = 32,653.26 × 7,913.16
  4. Step 4: Simplify right side
    21,767.40x = 258,390,470.90
  5. Step 5: Solve for x
    x = 258,390,470.90/21,767.40
  6. Step 6: Final answer
    x = 11,870.53

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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.