Home / 21,049.79-31,420.59-18,558.74

Finding the Fourth Proportional to 21,049.79, 31,420.59 and 18,558.74

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Solution

The fourth proportional to 21,049.79, 31,420.59 and 18,558.74 is: 27,702.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,049.79 : 31,420.59 = 18,558.74 : x
  2. Step 2: Convert to fraction form
    21,049.79/31,420.59 = 18,558.74/x
  3. Step 3: Cross multiply
    21,049.79x = 31,420.59 × 18,558.74
  4. Step 4: Simplify right side
    21,049.79x = 583,126,467.66
  5. Step 5: Solve for x
    x = 583,126,467.66/21,049.79
  6. Step 6: Final answer
    x = 27,702.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.