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Finding the Fourth Proportional to 12,672.40, 19,030.20 and 9,000.40

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Solution

The fourth proportional to 12,672.40, 19,030.20 and 9,000.40 is: 13,515.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.40 : 19,030.20 = 9,000.40 : x
  2. Step 2: Convert to fraction form
    12,672.40/19,030.20 = 9,000.40/x
  3. Step 3: Cross multiply
    12,672.40x = 19,030.20 × 9,000.40
  4. Step 4: Simplify right side
    12,672.40x = 171,279,412.08
  5. Step 5: Solve for x
    x = 171,279,412.08/12,672.40
  6. Step 6: Final answer
    x = 13,515.94

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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.