Home / 13,347.78-18,420.80-7,379.51

Finding the Fourth Proportional to 13,347.78, 18,420.80 and 7,379.51

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Solution

The fourth proportional to 13,347.78, 18,420.80 and 7,379.51 is: 10,184.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.78 : 18,420.80 = 7,379.51 : x
  2. Step 2: Convert to fraction form
    13,347.78/18,420.80 = 7,379.51/x
  3. Step 3: Cross multiply
    13,347.78x = 18,420.80 × 7,379.51
  4. Step 4: Simplify right side
    13,347.78x = 135,936,348.81
  5. Step 5: Solve for x
    x = 135,936,348.81/13,347.78
  6. Step 6: Final answer
    x = 10,184.19

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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.