Home / 15,848.80-21,872.40-9,136.60

Finding the Fourth Proportional to 15,848.80, 21,872.40 and 9,136.60

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Solution

The fourth proportional to 15,848.80, 21,872.40 and 9,136.60 is: 12,609.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,848.80 : 21,872.40 = 9,136.60 : x
  2. Step 2: Convert to fraction form
    15,848.80/21,872.40 = 9,136.60/x
  3. Step 3: Cross multiply
    15,848.80x = 21,872.40 × 9,136.60
  4. Step 4: Simplify right side
    15,848.80x = 199,839,369.84
  5. Step 5: Solve for x
    x = 199,839,369.84/15,848.80
  6. Step 6: Final answer
    x = 12,609.12

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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.