Home / 11,133.79-15,380.40-9,739.57

Finding the Fourth Proportional to 11,133.79, 15,380.40 and 9,739.57

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Solution

The fourth proportional to 11,133.79, 15,380.40 and 9,739.57 is: 13,454.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,133.79 : 15,380.40 = 9,739.57 : x
  2. Step 2: Convert to fraction form
    11,133.79/15,380.40 = 9,739.57/x
  3. Step 3: Cross multiply
    11,133.79x = 15,380.40 × 9,739.57
  4. Step 4: Simplify right side
    11,133.79x = 149,798,482.43
  5. Step 5: Solve for x
    x = 149,798,482.43/11,133.79
  6. Step 6: Final answer
    x = 13,454.40

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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.