Home / 30,907.36-42,658.21-20,165.55

Finding the Fourth Proportional to 30,907.36, 42,658.21 and 20,165.55

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Solution

The fourth proportional to 30,907.36, 42,658.21 and 20,165.55 is: 27,832.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,907.36 : 42,658.21 = 20,165.55 : x
  2. Step 2: Convert to fraction form
    30,907.36/42,658.21 = 20,165.55/x
  3. Step 3: Cross multiply
    30,907.36x = 42,658.21 × 20,165.55
  4. Step 4: Simplify right side
    30,907.36x = 860,226,266.67
  5. Step 5: Solve for x
    x = 860,226,266.67/30,907.36
  6. Step 6: Final answer
    x = 27,832.41

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Half scale
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Double scale
Find fourth proportional to 30,908.36, 42,659.59 and 20,166.55
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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.