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Finding the Fourth Proportional to 15,807.90, 21,815.54 and 9,093.53

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Solution

The fourth proportional to 15,807.90, 21,815.54 and 9,093.53 is: 12,549.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,807.90 : 21,815.54 = 9,093.53 : x
  2. Step 2: Convert to fraction form
    15,807.90/21,815.54 = 9,093.53/x
  3. Step 3: Cross multiply
    15,807.90x = 21,815.54 × 9,093.53
  4. Step 4: Simplify right side
    15,807.90x = 198,380,267.46
  5. Step 5: Solve for x
    x = 198,380,267.46/15,807.90
  6. Step 6: Final answer
    x = 12,549.44

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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.