Home / 15,690.36-21,653.46-9,725.16

Finding the Fourth Proportional to 15,690.36, 21,653.46 and 9,725.16

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Solution

The fourth proportional to 15,690.36, 21,653.46 and 9,725.16 is: 13,421.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.36 : 21,653.46 = 9,725.16 : x
  2. Step 2: Convert to fraction form
    15,690.36/21,653.46 = 9,725.16/x
  3. Step 3: Cross multiply
    15,690.36x = 21,653.46 × 9,725.16
  4. Step 4: Simplify right side
    15,690.36x = 210,583,363.05
  5. Step 5: Solve for x
    x = 210,583,363.05/15,690.36
  6. Step 6: Final answer
    x = 13,421.19

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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.