Home / 7,920,455,931.60-11,880,683,897.40-3,988,642,837.20

Finding the Fourth Proportional to 7,920,455,931.60, 11,880,683,897.40 and 3,988,642,837.20

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Solution

The fourth proportional to 7,920,455,931.60, 11,880,683,897.40 and 3,988,642,837.20 is: 5,982,964,255.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920,455,931.60 : 11,880,683,897.40 = 3,988,642,837.20 : x
  2. Step 2: Convert to fraction form
    7,920,455,931.60/11,880,683,897.40 = 3,988,642,837.20/x
  3. Step 3: Cross multiply
    7,920,455,931.60x = 11,880,683,897.40 × 3,988,642,837.20
  4. Step 4: Simplify right side
    7,920,455,931.60x = 47,387,804,728,401,887,232
  5. Step 5: Solve for x
    x = 47,387,804,728,401,887,232/7,920,455,931.60
  6. Step 6: Final answer
    x = 5,982,964,255.80

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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.