Home / 30,657.12-42,310.08-18,721.92

Finding the Fourth Proportional to 30,657.12, 42,310.08 and 18,721.92

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Solution

The fourth proportional to 30,657.12, 42,310.08 and 18,721.92 is: 25,838.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,657.12 : 42,310.08 = 18,721.92 : x
  2. Step 2: Convert to fraction form
    30,657.12/42,310.08 = 18,721.92/x
  3. Step 3: Cross multiply
    30,657.12x = 42,310.08 × 18,721.92
  4. Step 4: Simplify right side
    30,657.12x = 792,125,932.95
  5. Step 5: Solve for x
    x = 792,125,932.95/30,657.12
  6. Step 6: Final answer
    x = 25,838.24

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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.