Home / 15,775.84-21,770.40-8,702.92

Finding the Fourth Proportional to 15,775.84, 21,770.40 and 8,702.92

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Solution

The fourth proportional to 15,775.84, 21,770.40 and 8,702.92 is: 12,009.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.84 : 21,770.40 = 8,702.92 : x
  2. Step 2: Convert to fraction form
    15,775.84/21,770.40 = 8,702.92/x
  3. Step 3: Cross multiply
    15,775.84x = 21,770.40 × 8,702.92
  4. Step 4: Simplify right side
    15,775.84x = 189,466,049.57
  5. Step 5: Solve for x
    x = 189,466,049.57/15,775.84
  6. Step 6: Final answer
    x = 12,009.89

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Half scale
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Double scale
Find fourth proportional to 15,776.84, 21,771.78 and 8,703.92
Similar ratio
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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.