Home / 21,283.20-31,915.53-7,239.42

Finding the Fourth Proportional to 21,283.20, 31,915.53 and 7,239.42

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Solution

The fourth proportional to 21,283.20, 31,915.53 and 7,239.42 is: 10,855.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,283.20 : 31,915.53 = 7,239.42 : x
  2. Step 2: Convert to fraction form
    21,283.20/31,915.53 = 7,239.42/x
  3. Step 3: Cross multiply
    21,283.20x = 31,915.53 × 7,239.42
  4. Step 4: Simplify right side
    21,283.20x = 231,049,926.19
  5. Step 5: Solve for x
    x = 231,049,926.19/21,283.20
  6. Step 6: Final answer
    x = 10,855.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.