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Finding the Fourth Proportional to 18,435,643.10, 25,762,070.65 and 18,435,643.10

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Solution

The fourth proportional to 18,435,643.10, 25,762,070.65 and 18,435,643.10 is: 25,762,070.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,435,643.10 : 25,762,070.65 = 18,435,643.10 : x
  2. Step 2: Convert to fraction form
    18,435,643.10/25,762,070.65 = 18,435,643.10/x
  3. Step 3: Cross multiply
    18,435,643.10x = 25,762,070.65 × 18,435,643.10
  4. Step 4: Simplify right side
    18,435,643.10x = 474,940,340,020,385
  5. Step 5: Solve for x
    x = 474,940,340,020,385/18,435,643.10
  6. Step 6: Final answer
    x = 25,762,070.65

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.