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Finding the Fourth Proportional to 12,683.95, 17,509.95 and 8,442.07

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Solution

The fourth proportional to 12,683.95, 17,509.95 and 8,442.07 is: 11,654.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,683.95 : 17,509.95 = 8,442.07 : x
  2. Step 2: Convert to fraction form
    12,683.95/17,509.95 = 8,442.07/x
  3. Step 3: Cross multiply
    12,683.95x = 17,509.95 × 8,442.07
  4. Step 4: Simplify right side
    12,683.95x = 147,820,223.60
  5. Step 5: Solve for x
    x = 147,820,223.60/12,683.95
  6. Step 6: Final answer
    x = 11,654.12

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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.