Home / 30,937.62-42,667.54-20,852.80

Finding the Fourth Proportional to 30,937.62, 42,667.54 and 20,852.80

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Solution

The fourth proportional to 30,937.62, 42,667.54 and 20,852.80 is: 28,759.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,937.62 : 42,667.54 = 20,852.80 : x
  2. Step 2: Convert to fraction form
    30,937.62/42,667.54 = 20,852.80/x
  3. Step 3: Cross multiply
    30,937.62x = 42,667.54 × 20,852.80
  4. Step 4: Simplify right side
    30,937.62x = 889,737,678.11
  5. Step 5: Solve for x
    x = 889,737,678.11/30,937.62
  6. Step 6: Final answer
    x = 28,759.09

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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.