Home / 20,886.86-31,336.05-9,645.63

Finding the Fourth Proportional to 20,886.86, 31,336.05 and 9,645.63

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Solution

The fourth proportional to 20,886.86, 31,336.05 and 9,645.63 is: 14,471.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.86 : 31,336.05 = 9,645.63 : x
  2. Step 2: Convert to fraction form
    20,886.86/31,336.05 = 9,645.63/x
  3. Step 3: Cross multiply
    20,886.86x = 31,336.05 × 9,645.63
  4. Step 4: Simplify right side
    20,886.86x = 302,255,943.96
  5. Step 5: Solve for x
    x = 302,255,943.96/20,886.86
  6. Step 6: Final answer
    x = 14,471.11

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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.