Home / 15,702.88-21,678.40-12,109.98

Finding the Fourth Proportional to 15,702.88, 21,678.40 and 12,109.98

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Solution

The fourth proportional to 15,702.88, 21,678.40 and 12,109.98 is: 16,718.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,702.88 : 21,678.40 = 12,109.98 : x
  2. Step 2: Convert to fraction form
    15,702.88/21,678.40 = 12,109.98/x
  3. Step 3: Cross multiply
    15,702.88x = 21,678.40 × 12,109.98
  4. Step 4: Simplify right side
    15,702.88x = 262,524,990.43
  5. Step 5: Solve for x
    x = 262,524,990.43/15,702.88
  6. Step 6: Final answer
    x = 16,718.27

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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.