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Finding the Fourth Proportional to 9,915.90, 14,875.68 and 8,083.10

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Solution

The fourth proportional to 9,915.90, 14,875.68 and 8,083.10 is: 12,126.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.90 : 14,875.68 = 8,083.10 : x
  2. Step 2: Convert to fraction form
    9,915.90/14,875.68 = 8,083.10/x
  3. Step 3: Cross multiply
    9,915.90x = 14,875.68 × 8,083.10
  4. Step 4: Simplify right side
    9,915.90x = 120,241,609.01
  5. Step 5: Solve for x
    x = 120,241,609.01/9,915.90
  6. Step 6: Final answer
    x = 12,126.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.