Home / 21,187,921.81-31,781,989.84-6,613,619.60

Finding the Fourth Proportional to 21,187,921.81, 31,781,989.84 and 6,613,619.60

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Solution

The fourth proportional to 21,187,921.81, 31,781,989.84 and 6,613,619.60 is: 9,920,462.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187,921.81 : 31,781,989.84 = 6,613,619.60 : x
  2. Step 2: Convert to fraction form
    21,187,921.81/31,781,989.84 = 6,613,619.60/x
  3. Step 3: Cross multiply
    21,187,921.81x = 31,781,989.84 × 6,613,619.60
  4. Step 4: Simplify right side
    21,187,921.81x = 210,193,990,932,824.84
  5. Step 5: Solve for x
    x = 210,193,990,932,824.84/21,187,921.81
  6. Step 6: Final answer
    x = 9,920,462.84

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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.