Home / 15,726.37-21,702.27-8,921.69

Finding the Fourth Proportional to 15,726.37, 21,702.27 and 8,921.69

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Solution

The fourth proportional to 15,726.37, 21,702.27 and 8,921.69 is: 12,311.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,726.37 : 21,702.27 = 8,921.69 : x
  2. Step 2: Convert to fraction form
    15,726.37/21,702.27 = 8,921.69/x
  3. Step 3: Cross multiply
    15,726.37x = 21,702.27 × 8,921.69
  4. Step 4: Simplify right side
    15,726.37x = 193,620,925.24
  5. Step 5: Solve for x
    x = 193,620,925.24/15,726.37
  6. Step 6: Final answer
    x = 12,311.86

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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.