Home / 21,431.34-29,574.27-11,870.60

Finding the Fourth Proportional to 21,431.34, 29,574.27 and 11,870.60

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Solution

The fourth proportional to 21,431.34, 29,574.27 and 11,870.60 is: 16,380.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.34 : 29,574.27 = 11,870.60 : x
  2. Step 2: Convert to fraction form
    21,431.34/29,574.27 = 11,870.60/x
  3. Step 3: Cross multiply
    21,431.34x = 29,574.27 × 11,870.60
  4. Step 4: Simplify right side
    21,431.34x = 351,064,181.59
  5. Step 5: Solve for x
    x = 351,064,181.59/21,431.34
  6. Step 6: Final answer
    x = 16,380.88

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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.