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Finding the Fourth Proportional to 15,553,686.80, 21,797,556.40 and 15,553,686.80

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Solution

The fourth proportional to 15,553,686.80, 21,797,556.40 and 15,553,686.80 is: 21,797,556.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,553,686.80 : 21,797,556.40 = 15,553,686.80 : x
  2. Step 2: Convert to fraction form
    15,553,686.80/21,797,556.40 = 15,553,686.80/x
  3. Step 3: Cross multiply
    15,553,686.80x = 21,797,556.40 × 15,553,686.80
  4. Step 4: Simplify right side
    15,553,686.80x = 339,032,365,250,935.50
  5. Step 5: Solve for x
    x = 339,032,365,250,935.50/15,553,686.80
  6. Step 6: Final answer
    x = 21,797,556.40

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1.5x scale

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.