Home / 19,161.12-28,702.80-12,590.40

Finding the Fourth Proportional to 19,161.12, 28,702.80 and 12,590.40

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Solution

The fourth proportional to 19,161.12, 28,702.80 and 12,590.40 is: 18,860.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,161.12 : 28,702.80 = 12,590.40 : x
  2. Step 2: Convert to fraction form
    19,161.12/28,702.80 = 12,590.40/x
  3. Step 3: Cross multiply
    19,161.12x = 28,702.80 × 12,590.40
  4. Step 4: Simplify right side
    19,161.12x = 361,379,733.12
  5. Step 5: Solve for x
    x = 361,379,733.12/19,161.12
  6. Step 6: Final answer
    x = 18,860.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.