Home / 13,365.10-18,416.19-9,390.70

Finding the Fourth Proportional to 13,365.10, 18,416.19 and 9,390.70

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Solution

The fourth proportional to 13,365.10, 18,416.19 and 9,390.70 is: 12,939.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,365.10 : 18,416.19 = 9,390.70 : x
  2. Step 2: Convert to fraction form
    13,365.10/18,416.19 = 9,390.70/x
  3. Step 3: Cross multiply
    13,365.10x = 18,416.19 × 9,390.70
  4. Step 4: Simplify right side
    13,365.10x = 172,940,915.43
  5. Step 5: Solve for x
    x = 172,940,915.43/13,365.10
  6. Step 6: Final answer
    x = 12,939.74

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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.