Home / 12,774,686.40-19,176,026.40-7,987,780.80

Finding the Fourth Proportional to 12,774,686.40, 19,176,026.40 and 7,987,780.80

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Solution

The fourth proportional to 12,774,686.40, 19,176,026.40 and 7,987,780.80 is: 11,990,423.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,774,686.40 : 19,176,026.40 = 7,987,780.80 : x
  2. Step 2: Convert to fraction form
    12,774,686.40/19,176,026.40 = 7,987,780.80/x
  3. Step 3: Cross multiply
    12,774,686.40x = 19,176,026.40 × 7,987,780.80
  4. Step 4: Simplify right side
    12,774,686.40x = 153,173,895,498,213.09
  5. Step 5: Solve for x
    x = 153,173,895,498,213.09/12,774,686.40
  6. Step 6: Final answer
    x = 11,990,423.15

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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.