Home / 30,691.44-42,354.36-18,122.40

Finding the Fourth Proportional to 30,691.44, 42,354.36 and 18,122.40

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Solution

The fourth proportional to 30,691.44, 42,354.36 and 18,122.40 is: 25,009.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,691.44 : 42,354.36 = 18,122.40 : x
  2. Step 2: Convert to fraction form
    30,691.44/42,354.36 = 18,122.40/x
  3. Step 3: Cross multiply
    30,691.44x = 42,354.36 × 18,122.40
  4. Step 4: Simplify right side
    30,691.44x = 767,562,653.66
  5. Step 5: Solve for x
    x = 767,562,653.66/30,691.44
  6. Step 6: Final answer
    x = 25,009.01

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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.