Home / 21,235,140.20-31,697,685.74-18,221,869.73

Finding the Fourth Proportional to 21,235,140.20, 31,697,685.74 and 18,221,869.73

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Solution

The fourth proportional to 21,235,140.20, 31,697,685.74 and 18,221,869.73 is: 27,199,778.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235,140.20 : 31,697,685.74 = 18,221,869.73 : x
  2. Step 2: Convert to fraction form
    21,235,140.20/31,697,685.74 = 18,221,869.73/x
  3. Step 3: Cross multiply
    21,235,140.20x = 31,697,685.74 × 18,221,869.73
  4. Step 4: Simplify right side
    21,235,140.20x = 577,591,100,421,557.62
  5. Step 5: Solve for x
    x = 577,591,100,421,557.62/21,235,140.20
  6. Step 6: Final answer
    x = 27,199,778.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.