Home / 13,542.37-18,687.90-7,877.13

Finding the Fourth Proportional to 13,542.37, 18,687.90 and 7,877.13

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Solution

The fourth proportional to 13,542.37, 18,687.90 and 7,877.13 is: 10,870.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,542.37 : 18,687.90 = 7,877.13 : x
  2. Step 2: Convert to fraction form
    13,542.37/18,687.90 = 7,877.13/x
  3. Step 3: Cross multiply
    13,542.37x = 18,687.90 × 7,877.13
  4. Step 4: Simplify right side
    13,542.37x = 147,207,051.56
  5. Step 5: Solve for x
    x = 147,207,051.56/13,542.37
  6. Step 6: Final answer
    x = 10,870.11

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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.