Home / 19,311.45-28,959.88-8,915.91

Finding the Fourth Proportional to 19,311.45, 28,959.88 and 8,915.91

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Solution

The fourth proportional to 19,311.45, 28,959.88 and 8,915.91 is: 13,370.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,311.45 : 28,959.88 = 8,915.91 : x
  2. Step 2: Convert to fraction form
    19,311.45/28,959.88 = 8,915.91/x
  3. Step 3: Cross multiply
    19,311.45x = 28,959.88 × 8,915.91
  4. Step 4: Simplify right side
    19,311.45x = 258,203,569.52
  5. Step 5: Solve for x
    x = 258,203,569.52/19,311.45
  6. Step 6: Final answer
    x = 13,370.49

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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.