Home / 20,809,907.28-31,152,669.84-12,587,666.40

Finding the Fourth Proportional to 20,809,907.28, 31,152,669.84 and 12,587,666.40

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Solution

The fourth proportional to 20,809,907.28, 31,152,669.84 and 12,587,666.40 is: 18,843,880.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809,907.28 : 31,152,669.84 = 12,587,666.40 : x
  2. Step 2: Convert to fraction form
    20,809,907.28/31,152,669.84 = 12,587,666.40/x
  3. Step 3: Cross multiply
    20,809,907.28x = 31,152,669.84 × 12,587,666.40
  4. Step 4: Simplify right side
    20,809,907.28x = 392,139,415,415,261.38
  5. Step 5: Solve for x
    x = 392,139,415,415,261.38/20,809,907.28
  6. Step 6: Final answer
    x = 18,843,880.95

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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.