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Finding the Fourth Proportional to 7,830,045.65, 10,987,258.15 and 7,830,045.65

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Solution

The fourth proportional to 7,830,045.65, 10,987,258.15 and 7,830,045.65 is: 10,987,258.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,830,045.65 : 10,987,258.15 = 7,830,045.65 : x
  2. Step 2: Convert to fraction form
    7,830,045.65/10,987,258.15 = 7,830,045.65/x
  3. Step 3: Cross multiply
    7,830,045.65x = 10,987,258.15 × 7,830,045.65
  4. Step 4: Simplify right side
    7,830,045.65x = 86,030,732,882,834.55
  5. Step 5: Solve for x
    x = 86,030,732,882,834.55/7,830,045.65
  6. Step 6: Final answer
    x = 10,987,258.15

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Double scale
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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.