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Finding the Fourth Proportional to 28,013,843.88, 38,659,106.16 and 15,136,787.88

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Solution

The fourth proportional to 28,013,843.88, 38,659,106.16 and 15,136,787.88 is: 20,888,768.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,013,843.88 : 38,659,106.16 = 15,136,787.88 : x
  2. Step 2: Convert to fraction form
    28,013,843.88/38,659,106.16 = 15,136,787.88/x
  3. Step 3: Cross multiply
    28,013,843.88x = 38,659,106.16 × 15,136,787.88
  4. Step 4: Simplify right side
    28,013,843.88x = 585,174,689,574,321.38
  5. Step 5: Solve for x
    x = 585,174,689,574,321.38/28,013,843.88
  6. Step 6: Final answer
    x = 20,888,768.14

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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.