Home / 20,989,930,786.80-31,496,989,415.40-7,913,112,457.20

Finding the Fourth Proportional to 20,989,930,786.80, 31,496,989,415.40 and 7,913,112,457.20

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Solution

The fourth proportional to 20,989,930,786.80, 31,496,989,415.40 and 7,913,112,457.20 is: 11,874,227,782.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989,930,786.80 : 31,496,989,415.40 = 7,913,112,457.20 : x
  2. Step 2: Convert to fraction form
    20,989,930,786.80/31,496,989,415.40 = 7,913,112,457.20/x
  3. Step 3: Cross multiply
    20,989,930,786.80x = 31,496,989,415.40 × 7,913,112,457.20
  4. Step 4: Simplify right side
    20,989,930,786.80x = 249,239,219,307,298,291,712
  5. Step 5: Solve for x
    x = 249,239,219,307,298,291,712/20,989,930,786.80
  6. Step 6: Final answer
    x = 11,874,227,782.78

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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.