Home / 30,686.15-42,350.10-18,757.43

Finding the Fourth Proportional to 30,686.15, 42,350.10 and 18,757.43

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Solution

The fourth proportional to 30,686.15, 42,350.10 and 18,757.43 is: 25,887.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,686.15 : 42,350.10 = 18,757.43 : x
  2. Step 2: Convert to fraction form
    30,686.15/42,350.10 = 18,757.43/x
  3. Step 3: Cross multiply
    30,686.15x = 42,350.10 × 18,757.43
  4. Step 4: Simplify right side
    30,686.15x = 794,379,036.24
  5. Step 5: Solve for x
    x = 794,379,036.24/30,686.15
  6. Step 6: Final answer
    x = 25,887.22

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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.