Home / 21,431.61-29,574.94-11,871.81

Finding the Fourth Proportional to 21,431.61, 29,574.94 and 11,871.81

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Solution

The fourth proportional to 21,431.61, 29,574.94 and 11,871.81 is: 16,382.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.61 : 29,574.94 = 11,871.81 : x
  2. Step 2: Convert to fraction form
    21,431.61/29,574.94 = 11,871.81/x
  3. Step 3: Cross multiply
    21,431.61x = 29,574.94 × 11,871.81
  4. Step 4: Simplify right side
    21,431.61x = 351,108,068.44
  5. Step 5: Solve for x
    x = 351,108,068.44/21,431.61
  6. Step 6: Final answer
    x = 16,382.72

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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.