Home / 21,946.80-30,287.01-12,991.04

Finding the Fourth Proportional to 21,946.80, 30,287.01 and 12,991.04

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Solution

The fourth proportional to 21,946.80, 30,287.01 and 12,991.04 is: 17,927.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,946.80 : 30,287.01 = 12,991.04 : x
  2. Step 2: Convert to fraction form
    21,946.80/30,287.01 = 12,991.04/x
  3. Step 3: Cross multiply
    21,946.80x = 30,287.01 × 12,991.04
  4. Step 4: Simplify right side
    21,946.80x = 393,459,606.96
  5. Step 5: Solve for x
    x = 393,459,606.96/21,946.80
  6. Step 6: Final answer
    x = 17,927.88

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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.