Home / 20,641.16-28,484.20-11,688.60

Finding the Fourth Proportional to 20,641.16, 28,484.20 and 11,688.60

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Solution

The fourth proportional to 20,641.16, 28,484.20 and 11,688.60 is: 16,129.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.16 : 28,484.20 = 11,688.60 : x
  2. Step 2: Convert to fraction form
    20,641.16/28,484.20 = 11,688.60/x
  3. Step 3: Cross multiply
    20,641.16x = 28,484.20 × 11,688.60
  4. Step 4: Simplify right side
    20,641.16x = 332,940,420.12
  5. Step 5: Solve for x
    x = 332,940,420.12/20,641.16
  6. Step 6: Final answer
    x = 16,129.93

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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.