Home / 15,880.69-21,915.77-8,710.92

Finding the Fourth Proportional to 15,880.69, 21,915.77 and 8,710.92

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Solution

The fourth proportional to 15,880.69, 21,915.77 and 8,710.92 is: 12,021.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,880.69 : 21,915.77 = 8,710.92 : x
  2. Step 2: Convert to fraction form
    15,880.69/21,915.77 = 8,710.92/x
  3. Step 3: Cross multiply
    15,880.69x = 21,915.77 × 8,710.92
  4. Step 4: Simplify right side
    15,880.69x = 190,906,519.21
  5. Step 5: Solve for x
    x = 190,906,519.21/15,880.69
  6. Step 6: Final answer
    x = 12,021.30

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Half scale
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Double scale
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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.