Home / 20,417.86-28,179.26-12,458.40

Finding the Fourth Proportional to 20,417.86, 28,179.26 and 12,458.40

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Solution

The fourth proportional to 20,417.86, 28,179.26 and 12,458.40 is: 17,194.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,417.86 : 28,179.26 = 12,458.40 : x
  2. Step 2: Convert to fraction form
    20,417.86/28,179.26 = 12,458.40/x
  3. Step 3: Cross multiply
    20,417.86x = 28,179.26 × 12,458.40
  4. Step 4: Simplify right side
    20,417.86x = 351,068,492.78
  5. Step 5: Solve for x
    x = 351,068,492.78/20,417.86
  6. Step 6: Final answer
    x = 17,194.19

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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.