Home / 15,638.42-21,579.86-9,670.24

Finding the Fourth Proportional to 15,638.42, 21,579.86 and 9,670.24

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Solution

The fourth proportional to 15,638.42, 21,579.86 and 9,670.24 is: 13,344.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.42 : 21,579.86 = 9,670.24 : x
  2. Step 2: Convert to fraction form
    15,638.42/21,579.86 = 9,670.24/x
  3. Step 3: Cross multiply
    15,638.42x = 21,579.86 × 9,670.24
  4. Step 4: Simplify right side
    15,638.42x = 208,682,425.37
  5. Step 5: Solve for x
    x = 208,682,425.37/15,638.42
  6. Step 6: Final answer
    x = 13,344.21

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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.