Home / 20,657.63-28,514.28-12,159.65

Finding the Fourth Proportional to 20,657.63, 28,514.28 and 12,159.65

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Solution

The fourth proportional to 20,657.63, 28,514.28 and 12,159.65 is: 16,784.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.63 : 28,514.28 = 12,159.65 : x
  2. Step 2: Convert to fraction form
    20,657.63/28,514.28 = 12,159.65/x
  3. Step 3: Cross multiply
    20,657.63x = 28,514.28 × 12,159.65
  4. Step 4: Simplify right side
    20,657.63x = 346,723,522.23
  5. Step 5: Solve for x
    x = 346,723,522.23/20,657.63
  6. Step 6: Final answer
    x = 16,784.29

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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.