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Finding the Fourth Proportional to 22,989.74, 31,725.99 and 12,918.20

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Solution

The fourth proportional to 22,989.74, 31,725.99 and 12,918.20 is: 17,827.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,989.74 : 31,725.99 = 12,918.20 : x
  2. Step 2: Convert to fraction form
    22,989.74/31,725.99 = 12,918.20/x
  3. Step 3: Cross multiply
    22,989.74x = 31,725.99 × 12,918.20
  4. Step 4: Simplify right side
    22,989.74x = 409,842,525.39
  5. Step 5: Solve for x
    x = 409,842,525.39/22,989.74
  6. Step 6: Final answer
    x = 17,827.20

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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.