Home / 15,504.55-21,406.32-9,770.28

Finding the Fourth Proportional to 15,504.55, 21,406.32 and 9,770.28

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Solution

The fourth proportional to 15,504.55, 21,406.32 and 9,770.28 is: 13,489.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.55 : 21,406.32 = 9,770.28 : x
  2. Step 2: Convert to fraction form
    15,504.55/21,406.32 = 9,770.28/x
  3. Step 3: Cross multiply
    15,504.55x = 21,406.32 × 9,770.28
  4. Step 4: Simplify right side
    15,504.55x = 209,145,659.90
  5. Step 5: Solve for x
    x = 209,145,659.90/15,504.55
  6. Step 6: Final answer
    x = 13,489.31

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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.