Home / 21,315.24-29,410.02-12,930.12

Finding the Fourth Proportional to 21,315.24, 29,410.02 and 12,930.12

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Solution

The fourth proportional to 21,315.24, 29,410.02 and 12,930.12 is: 17,840.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.24 : 29,410.02 = 12,930.12 : x
  2. Step 2: Convert to fraction form
    21,315.24/29,410.02 = 12,930.12/x
  3. Step 3: Cross multiply
    21,315.24x = 29,410.02 × 12,930.12
  4. Step 4: Simplify right side
    21,315.24x = 380,275,087.80
  5. Step 5: Solve for x
    x = 380,275,087.80/21,315.24
  6. Step 6: Final answer
    x = 17,840.53

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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.