Home / 30,657.17-42,310.80-18,717.98

Finding the Fourth Proportional to 30,657.17, 42,310.80 and 18,717.98

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Solution

The fourth proportional to 30,657.17, 42,310.80 and 18,717.98 is: 25,833.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,657.17 : 42,310.80 = 18,717.98 : x
  2. Step 2: Convert to fraction form
    30,657.17/42,310.80 = 18,717.98/x
  3. Step 3: Cross multiply
    30,657.17x = 42,310.80 × 18,717.98
  4. Step 4: Simplify right side
    30,657.17x = 791,972,496.63
  5. Step 5: Solve for x
    x = 791,972,496.63/30,657.17
  6. Step 6: Final answer
    x = 25,833.19

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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.