Home / 12,479,280.40-18,722,419.80-5,294,256.40

Finding the Fourth Proportional to 12,479,280.40, 18,722,419.80 and 5,294,256.40

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Solution

The fourth proportional to 12,479,280.40, 18,722,419.80 and 5,294,256.40 is: 7,942,869.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479,280.40 : 18,722,419.80 = 5,294,256.40 : x
  2. Step 2: Convert to fraction form
    12,479,280.40/18,722,419.80 = 5,294,256.40/x
  3. Step 3: Cross multiply
    12,479,280.40x = 18,722,419.80 × 5,294,256.40
  4. Step 4: Simplify right side
    12,479,280.40x = 99,121,290,849,636.73
  5. Step 5: Solve for x
    x = 99,121,290,849,636.73/12,479,280.40
  6. Step 6: Final answer
    x = 7,942,869.11

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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.