Home / 21,378.02-29,512.04-15,018.12

Finding the Fourth Proportional to 21,378.02, 29,512.04 and 15,018.12

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Solution

The fourth proportional to 21,378.02, 29,512.04 and 15,018.12 is: 20,732.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.02 : 29,512.04 = 15,018.12 : x
  2. Step 2: Convert to fraction form
    21,378.02/29,512.04 = 15,018.12/x
  3. Step 3: Cross multiply
    21,378.02x = 29,512.04 × 15,018.12
  4. Step 4: Simplify right side
    21,378.02x = 443,215,283.07
  5. Step 5: Solve for x
    x = 443,215,283.07/21,378.02
  6. Step 6: Final answer
    x = 20,732.29

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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.