Home / 21,732.81-29,991.38-12,303.20

Finding the Fourth Proportional to 21,732.81, 29,991.38 and 12,303.20

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Solution

The fourth proportional to 21,732.81, 29,991.38 and 12,303.20 is: 16,978.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,732.81 : 29,991.38 = 12,303.20 : x
  2. Step 2: Convert to fraction form
    21,732.81/29,991.38 = 12,303.20/x
  3. Step 3: Cross multiply
    21,732.81x = 29,991.38 × 12,303.20
  4. Step 4: Simplify right side
    21,732.81x = 368,989,734.94
  5. Step 5: Solve for x
    x = 368,989,734.94/21,732.81
  6. Step 6: Final answer
    x = 16,978.46

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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.