Home / 21,946.79-30,287.02-12,991.03

Finding the Fourth Proportional to 21,946.79, 30,287.02 and 12,991.03

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Solution

The fourth proportional to 21,946.79, 30,287.02 and 12,991.03 is: 17,927.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,946.79 : 30,287.02 = 12,991.03 : x
  2. Step 2: Convert to fraction form
    21,946.79/30,287.02 = 12,991.03/x
  3. Step 3: Cross multiply
    21,946.79x = 30,287.02 × 12,991.03
  4. Step 4: Simplify right side
    21,946.79x = 393,459,477.24
  5. Step 5: Solve for x
    x = 393,459,477.24/21,946.79
  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.