Home / 15,374.91-21,218.36-8,915.87

Finding the Fourth Proportional to 15,374.91, 21,218.36 and 8,915.87

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Solution

The fourth proportional to 15,374.91, 21,218.36 and 8,915.87 is: 12,304.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,374.91 : 21,218.36 = 8,915.87 : x
  2. Step 2: Convert to fraction form
    15,374.91/21,218.36 = 8,915.87/x
  3. Step 3: Cross multiply
    15,374.91x = 21,218.36 × 8,915.87
  4. Step 4: Simplify right side
    15,374.91x = 189,180,147.84
  5. Step 5: Solve for x
    x = 189,180,147.84/15,374.91
  6. Step 6: Final answer
    x = 12,304.47

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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.