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Finding the Fourth Proportional to 18,692,603.20, 28,038,904.80 and 10,189,547.20

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Solution

The fourth proportional to 18,692,603.20, 28,038,904.80 and 10,189,547.20 is: 15,284,320.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,692,603.20 : 28,038,904.80 = 10,189,547.20 : x
  2. Step 2: Convert to fraction form
    18,692,603.20/28,038,904.80 = 10,189,547.20/x
  3. Step 3: Cross multiply
    18,692,603.20x = 28,038,904.80 × 10,189,547.20
  4. Step 4: Simplify right side
    18,692,603.20x = 285,703,743,895,906.56
  5. Step 5: Solve for x
    x = 285,703,743,895,906.56/18,692,603.20
  6. Step 6: Final answer
    x = 15,284,320.80

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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.