Home / 20,505,443.61-28,284,178.74-13,151,628.77

Finding the Fourth Proportional to 20,505,443.61, 28,284,178.74 and 13,151,628.77

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Solution

The fourth proportional to 20,505,443.61, 28,284,178.74 and 13,151,628.77 is: 18,140,695.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505,443.61 : 28,284,178.74 = 13,151,628.77 : x
  2. Step 2: Convert to fraction form
    20,505,443.61/28,284,178.74 = 13,151,628.77/x
  3. Step 3: Cross multiply
    20,505,443.61x = 28,284,178.74 × 13,151,628.77
  4. Step 4: Simplify right side
    20,505,443.61x = 371,983,018,711,385.44
  5. Step 5: Solve for x
    x = 371,983,018,711,385.44/20,505,443.61
  6. Step 6: Final answer
    x = 18,140,695.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.