Home / 15,631.31-21,573.27-8,915.40

Finding the Fourth Proportional to 15,631.31, 21,573.27 and 8,915.40

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Solution

The fourth proportional to 15,631.31, 21,573.27 and 8,915.40 is: 12,304.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.31 : 21,573.27 = 8,915.40 : x
  2. Step 2: Convert to fraction form
    15,631.31/21,573.27 = 8,915.40/x
  3. Step 3: Cross multiply
    15,631.31x = 21,573.27 × 8,915.40
  4. Step 4: Simplify right side
    15,631.31x = 192,334,355.09
  5. Step 5: Solve for x
    x = 192,334,355.09/15,631.31
  6. Step 6: Final answer
    x = 12,304.43

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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.