Home / 12,869.40-19,289.70-7,325.40

Finding the Fourth Proportional to 12,869.40, 19,289.70 and 7,325.40

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Solution

The fourth proportional to 12,869.40, 19,289.70 and 7,325.40 is: 10,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,869.40 : 19,289.70 = 7,325.40 : x
  2. Step 2: Convert to fraction form
    12,869.40/19,289.70 = 7,325.40/x
  3. Step 3: Cross multiply
    12,869.40x = 19,289.70 × 7,325.40
  4. Step 4: Simplify right side
    12,869.40x = 141,304,768.38
  5. Step 5: Solve for x
    x = 141,304,768.38/12,869.40
  6. Step 6: Final answer
    x = 10,979.90

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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.