Home / 20,645.71-28,491.77-12,146.32

Finding the Fourth Proportional to 20,645.71, 28,491.77 and 12,146.32

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Solution

The fourth proportional to 20,645.71, 28,491.77 and 12,146.32 is: 16,762.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.71 : 28,491.77 = 12,146.32 : x
  2. Step 2: Convert to fraction form
    20,645.71/28,491.77 = 12,146.32/x
  3. Step 3: Cross multiply
    20,645.71x = 28,491.77 × 12,146.32
  4. Step 4: Simplify right side
    20,645.71x = 346,070,155.79
  5. Step 5: Solve for x
    x = 346,070,155.79/20,645.71
  6. Step 6: Final answer
    x = 16,762.33

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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.