Home / 15,702.96-21,652.80-13,311.84

Finding the Fourth Proportional to 15,702.96, 21,652.80 and 13,311.84

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Solution

The fourth proportional to 15,702.96, 21,652.80 and 13,311.84 is: 18,355.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,702.96 : 21,652.80 = 13,311.84 : x
  2. Step 2: Convert to fraction form
    15,702.96/21,652.80 = 13,311.84/x
  3. Step 3: Cross multiply
    15,702.96x = 21,652.80 × 13,311.84
  4. Step 4: Simplify right side
    15,702.96x = 288,238,609.15
  5. Step 5: Solve for x
    x = 288,238,609.15/15,702.96
  6. Step 6: Final answer
    x = 18,355.69

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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.