Home / 21,612.81-29,833.05-12,663.16

Finding the Fourth Proportional to 21,612.81, 29,833.05 and 12,663.16

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Solution

The fourth proportional to 21,612.81, 29,833.05 and 12,663.16 is: 17,479.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,612.81 : 29,833.05 = 12,663.16 : x
  2. Step 2: Convert to fraction form
    21,612.81/29,833.05 = 12,663.16/x
  3. Step 3: Cross multiply
    21,612.81x = 29,833.05 × 12,663.16
  4. Step 4: Simplify right side
    21,612.81x = 377,780,685.44
  5. Step 5: Solve for x
    x = 377,780,685.44/21,612.81
  6. Step 6: Final answer
    x = 17,479.48

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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.