Home / 20,653.50-28,508.76-12,155.34

Finding the Fourth Proportional to 20,653.50, 28,508.76 and 12,155.34

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Solution

The fourth proportional to 20,653.50, 28,508.76 and 12,155.34 is: 16,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.50 : 28,508.76 = 12,155.34 : x
  2. Step 2: Convert to fraction form
    20,653.50/28,508.76 = 12,155.34/x
  3. Step 3: Cross multiply
    20,653.50x = 28,508.76 × 12,155.34
  4. Step 4: Simplify right side
    20,653.50x = 346,533,670.78
  5. Step 5: Solve for x
    x = 346,533,670.78/20,653.50
  6. Step 6: Final answer
    x = 16,778.45

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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.