Home / 7,920,455,921.85-11,880,683,882.78-3,988,642,827.45

Finding the Fourth Proportional to 7,920,455,921.85, 11,880,683,882.78 and 3,988,642,827.45

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Solution

The fourth proportional to 7,920,455,921.85, 11,880,683,882.78 and 3,988,642,827.45 is: 5,982,964,241.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920,455,921.85 : 11,880,683,882.78 = 3,988,642,827.45 : x
  2. Step 2: Convert to fraction form
    7,920,455,921.85/11,880,683,882.78 = 3,988,642,827.45/x
  3. Step 3: Cross multiply
    7,920,455,921.85x = 11,880,683,882.78 × 3,988,642,827.45
  4. Step 4: Simplify right side
    7,920,455,921.85x = 47,387,804,554,231,316,480
  5. Step 5: Solve for x
    x = 47,387,804,554,231,316,480/7,920,455,921.85
  6. Step 6: Final answer
    x = 5,982,964,241.18

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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.