Home / 9,919.31-13,686.48-5,725.13

Finding the Fourth Proportional to 9,919.31, 13,686.48 and 5,725.13

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Solution

The fourth proportional to 9,919.31, 13,686.48 and 5,725.13 is: 7,899.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.31 : 13,686.48 = 5,725.13 : x
  2. Step 2: Convert to fraction form
    9,919.31/13,686.48 = 5,725.13/x
  3. Step 3: Cross multiply
    9,919.31x = 13,686.48 × 5,725.13
  4. Step 4: Simplify right side
    9,919.31x = 78,356,808.81
  5. Step 5: Solve for x
    x = 78,356,808.81/9,919.31
  6. Step 6: Final answer
    x = 7,899.43

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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.