Home / 13,387.73-18,475.43-7,420.05

Finding the Fourth Proportional to 13,387.73, 18,475.43 and 7,420.05

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Solution

The fourth proportional to 13,387.73, 18,475.43 and 7,420.05 is: 10,239.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.73 : 18,475.43 = 7,420.05 : x
  2. Step 2: Convert to fraction form
    13,387.73/18,475.43 = 7,420.05/x
  3. Step 3: Cross multiply
    13,387.73x = 18,475.43 × 7,420.05
  4. Step 4: Simplify right side
    13,387.73x = 137,088,577.27
  5. Step 5: Solve for x
    x = 137,088,577.27/13,387.73
  6. Step 6: Final answer
    x = 10,239.87

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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.