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Finding the Fourth Proportional to 12,672.20, 19,008.30 and 10,339.40

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Solution

The fourth proportional to 12,672.20, 19,008.30 and 10,339.40 is: 15,509.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.20 : 19,008.30 = 10,339.40 : x
  2. Step 2: Convert to fraction form
    12,672.20/19,008.30 = 10,339.40/x
  3. Step 3: Cross multiply
    12,672.20x = 19,008.30 × 10,339.40
  4. Step 4: Simplify right side
    12,672.20x = 196,534,417.02
  5. Step 5: Solve for x
    x = 196,534,417.02/12,672.20
  6. Step 6: Final answer
    x = 15,509.10

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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.