Home / 30,879.56-42,612.36-19,555.04

Finding the Fourth Proportional to 30,879.56, 42,612.36 and 19,555.04

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Solution

The fourth proportional to 30,879.56, 42,612.36 and 19,555.04 is: 26,985.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,879.56 : 42,612.36 = 19,555.04 : x
  2. Step 2: Convert to fraction form
    30,879.56/42,612.36 = 19,555.04/x
  3. Step 3: Cross multiply
    30,879.56x = 42,612.36 × 19,555.04
  4. Step 4: Simplify right side
    30,879.56x = 833,286,404.29
  5. Step 5: Solve for x
    x = 833,286,404.29/30,879.56
  6. Step 6: Final answer
    x = 26,985.05

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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.