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Finding the Fourth Proportional to 12,782.70, 19,152.15 and 10,158.30

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Solution

The fourth proportional to 12,782.70, 19,152.15 and 10,158.30 is: 15,220.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,782.70 : 19,152.15 = 10,158.30 : x
  2. Step 2: Convert to fraction form
    12,782.70/19,152.15 = 10,158.30/x
  3. Step 3: Cross multiply
    12,782.70x = 19,152.15 × 10,158.30
  4. Step 4: Simplify right side
    12,782.70x = 194,553,285.35
  5. Step 5: Solve for x
    x = 194,553,285.35/12,782.70
  6. Step 6: Final answer
    x = 15,220.05

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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.