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Finding the Fourth Proportional to 15,880.68, 21,914.56 and 8,710.44

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Solution

The fourth proportional to 15,880.68, 21,914.56 and 8,710.44 is: 12,019.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,880.68 : 21,914.56 = 8,710.44 : x
  2. Step 2: Convert to fraction form
    15,880.68/21,914.56 = 8,710.44/x
  3. Step 3: Cross multiply
    15,880.68x = 21,914.56 × 8,710.44
  4. Step 4: Simplify right side
    15,880.68x = 190,885,460.01
  5. Step 5: Solve for x
    x = 190,885,460.01/15,880.68
  6. Step 6: Final answer
    x = 12,019.98

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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.