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Finding the Fourth Proportional to 13,191,509.80, 19,787,264.70 and 13,191,509.80

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Solution

The fourth proportional to 13,191,509.80, 19,787,264.70 and 13,191,509.80 is: 19,787,264.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191,509.80 : 19,787,264.70 = 13,191,509.80 : x
  2. Step 2: Convert to fraction form
    13,191,509.80/19,787,264.70 = 13,191,509.80/x
  3. Step 3: Cross multiply
    13,191,509.80x = 19,787,264.70 × 13,191,509.80
  4. Step 4: Simplify right side
    13,191,509.80x = 261,023,896,205,244.06
  5. Step 5: Solve for x
    x = 261,023,896,205,244.06/13,191,509.80
  6. Step 6: Final answer
    x = 19,787,264.70

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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.