Home / 21,211,782.16-31,792,989.30-12,120,248.20

Finding the Fourth Proportional to 21,211,782.16, 31,792,989.30 and 12,120,248.20

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Solution

The fourth proportional to 21,211,782.16, 31,792,989.30 and 12,120,248.20 is: 18,166,268.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211,782.16 : 31,792,989.30 = 12,120,248.20 : x
  2. Step 2: Convert to fraction form
    21,211,782.16/31,792,989.30 = 12,120,248.20/x
  3. Step 3: Cross multiply
    21,211,782.16x = 31,792,989.30 × 12,120,248.20
  4. Step 4: Simplify right side
    21,211,782.16x = 385,338,921,335,944.25
  5. Step 5: Solve for x
    x = 385,338,921,335,944.25/21,211,782.16
  6. Step 6: Final answer
    x = 18,166,268.09

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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.