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Finding the Fourth Proportional to 18,861,854.40, 28,292,781.60 and 17,745,828.30

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Solution

The fourth proportional to 18,861,854.40, 28,292,781.60 and 17,745,828.30 is: 26,618,742.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861,854.40 : 28,292,781.60 = 17,745,828.30 : x
  2. Step 2: Convert to fraction form
    18,861,854.40/28,292,781.60 = 17,745,828.30/x
  3. Step 3: Cross multiply
    18,861,854.40x = 28,292,781.60 × 17,745,828.30
  4. Step 4: Simplify right side
    18,861,854.40x = 502,078,844,402,999.31
  5. Step 5: Solve for x
    x = 502,078,844,402,999.31/18,861,854.40
  6. Step 6: Final answer
    x = 26,618,742.45

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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.