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Finding the Fourth Proportional to 12,915.10, 19,354.18 and 7,356.98

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Solution

The fourth proportional to 12,915.10, 19,354.18 and 7,356.98 is: 11,024.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.10 : 19,354.18 = 7,356.98 : x
  2. Step 2: Convert to fraction form
    12,915.10/19,354.18 = 7,356.98/x
  3. Step 3: Cross multiply
    12,915.10x = 19,354.18 × 7,356.98
  4. Step 4: Simplify right side
    12,915.10x = 142,388,315.18
  5. Step 5: Solve for x
    x = 142,388,315.18/12,915.10
  6. Step 6: Final answer
    x = 11,024.95

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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.