Home / 13,872,000.70-20,808,001.05-12,777,139.90

Finding the Fourth Proportional to 13,872,000.70, 20,808,001.05 and 12,777,139.90

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Solution

The fourth proportional to 13,872,000.70, 20,808,001.05 and 12,777,139.90 is: 19,165,709.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,872,000.70 : 20,808,001.05 = 12,777,139.90 : x
  2. Step 2: Convert to fraction form
    13,872,000.70/20,808,001.05 = 12,777,139.90/x
  3. Step 3: Cross multiply
    13,872,000.70x = 20,808,001.05 × 12,777,139.90
  4. Step 4: Simplify right side
    13,872,000.70x = 265,866,740,455,196.91
  5. Step 5: Solve for x
    x = 265,866,740,455,196.91/13,872,000.70
  6. Step 6: Final answer
    x = 19,165,709.85

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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.