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Finding the Fourth Proportional to 15,808.85, 21,790.87 and 10,702.75

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Solution

The fourth proportional to 15,808.85, 21,790.87 and 10,702.75 is: 14,752.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808.85 : 21,790.87 = 10,702.75 : x
  2. Step 2: Convert to fraction form
    15,808.85/21,790.87 = 10,702.75/x
  3. Step 3: Cross multiply
    15,808.85x = 21,790.87 × 10,702.75
  4. Step 4: Simplify right side
    15,808.85x = 233,222,233.89
  5. Step 5: Solve for x
    x = 233,222,233.89/15,808.85
  6. Step 6: Final answer
    x = 14,752.64

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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.