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Finding the Fourth Proportional to 12,788,308.80, 19,182,463.20 and 7,737,019.20

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Solution

The fourth proportional to 12,788,308.80, 19,182,463.20 and 7,737,019.20 is: 11,605,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,788,308.80 : 19,182,463.20 = 7,737,019.20 : x
  2. Step 2: Convert to fraction form
    12,788,308.80/19,182,463.20 = 7,737,019.20/x
  3. Step 3: Cross multiply
    12,788,308.80x = 19,182,463.20 × 7,737,019.20
  4. Step 4: Simplify right side
    12,788,308.80x = 148,415,086,081,693.44
  5. Step 5: Solve for x
    x = 148,415,086,081,693.44/12,788,308.80
  6. Step 6: Final answer
    x = 11,605,528.80

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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.