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Finding the Fourth Proportional to 21,905.66, 32,859.65 and 7,113.49

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Solution

The fourth proportional to 21,905.66, 32,859.65 and 7,113.49 is: 10,670.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.66 : 32,859.65 = 7,113.49 : x
  2. Step 2: Convert to fraction form
    21,905.66/32,859.65 = 7,113.49/x
  3. Step 3: Cross multiply
    21,905.66x = 32,859.65 × 7,113.49
  4. Step 4: Simplify right side
    21,905.66x = 233,746,727.31
  5. Step 5: Solve for x
    x = 233,746,727.31/21,905.66
  6. Step 6: Final answer
    x = 10,670.61

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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.