Home / 30,972.28-42,745.58-18,397.08

Finding the Fourth Proportional to 30,972.28, 42,745.58 and 18,397.08

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Solution

The fourth proportional to 30,972.28, 42,745.58 and 18,397.08 is: 25,390.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972.28 : 42,745.58 = 18,397.08 : x
  2. Step 2: Convert to fraction form
    30,972.28/42,745.58 = 18,397.08/x
  3. Step 3: Cross multiply
    30,972.28x = 42,745.58 × 18,397.08
  4. Step 4: Simplify right side
    30,972.28x = 786,393,854.91
  5. Step 5: Solve for x
    x = 786,393,854.91/30,972.28
  6. Step 6: Final answer
    x = 25,390.25

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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.