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Finding the Fourth Proportional to 12,908.40, 19,351.80 and 6,752.40

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Solution

The fourth proportional to 12,908.40, 19,351.80 and 6,752.40 is: 10,122.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,908.40 : 19,351.80 = 6,752.40 : x
  2. Step 2: Convert to fraction form
    12,908.40/19,351.80 = 6,752.40/x
  3. Step 3: Cross multiply
    12,908.40x = 19,351.80 × 6,752.40
  4. Step 4: Simplify right side
    12,908.40x = 130,671,094.32
  5. Step 5: Solve for x
    x = 130,671,094.32/12,908.40
  6. Step 6: Final answer
    x = 10,122.95

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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.