Home / 12,631.10-17,420.67-11,115.41

Finding the Fourth Proportional to 12,631.10, 17,420.67 and 11,115.41

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Solution

The fourth proportional to 12,631.10, 17,420.67 and 11,115.41 is: 15,330.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.10 : 17,420.67 = 11,115.41 : x
  2. Step 2: Convert to fraction form
    12,631.10/17,420.67 = 11,115.41/x
  3. Step 3: Cross multiply
    12,631.10x = 17,420.67 × 11,115.41
  4. Step 4: Simplify right side
    12,631.10x = 193,637,802.42
  5. Step 5: Solve for x
    x = 193,637,802.42/12,631.10
  6. Step 6: Final answer
    x = 15,330.25

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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.