Home / 30,805.36-42,511.40-16,658.20

Finding the Fourth Proportional to 30,805.36, 42,511.40 and 16,658.20

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Solution

The fourth proportional to 30,805.36, 42,511.40 and 16,658.20 is: 22,988.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,805.36 : 42,511.40 = 16,658.20 : x
  2. Step 2: Convert to fraction form
    30,805.36/42,511.40 = 16,658.20/x
  3. Step 3: Cross multiply
    30,805.36x = 42,511.40 × 16,658.20
  4. Step 4: Simplify right side
    30,805.36x = 708,163,338.85
  5. Step 5: Solve for x
    x = 708,163,338.85/30,805.36
  6. Step 6: Final answer
    x = 22,988.32

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Double scale
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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.