Home / 11,123.46-15,325.20-9,130.86

Finding the Fourth Proportional to 11,123.46, 15,325.20 and 9,130.86

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Solution

The fourth proportional to 11,123.46, 15,325.20 and 9,130.86 is: 12,579.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,123.46 : 15,325.20 = 9,130.86 : x
  2. Step 2: Convert to fraction form
    11,123.46/15,325.20 = 9,130.86/x
  3. Step 3: Cross multiply
    11,123.46x = 15,325.20 × 9,130.86
  4. Step 4: Simplify right side
    11,123.46x = 139,932,255.67
  5. Step 5: Solve for x
    x = 139,932,255.67/11,123.46
  6. Step 6: Final answer
    x = 12,579.92

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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.