Home / 28,171,977.80-42,257,966.70-21,786,812.60

Finding the Fourth Proportional to 28,171,977.80, 42,257,966.70 and 21,786,812.60

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Solution

The fourth proportional to 28,171,977.80, 42,257,966.70 and 21,786,812.60 is: 32,680,218.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,171,977.80 : 42,257,966.70 = 21,786,812.60 : x
  2. Step 2: Convert to fraction form
    28,171,977.80/42,257,966.70 = 21,786,812.60/x
  3. Step 3: Cross multiply
    28,171,977.80x = 42,257,966.70 × 21,786,812.60
  4. Step 4: Simplify right side
    28,171,977.80x = 920,666,401,349,940.50
  5. Step 5: Solve for x
    x = 920,666,401,349,940.50/28,171,977.80
  6. Step 6: Final answer
    x = 32,680,218.90

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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.